[Objective] This study aimed to explore the effects of nitrogen fertigation rate on the protein components in grains and processing quality of different wheat varieties. [Method] Under the condition of higher soil fer...[Objective] This study aimed to explore the effects of nitrogen fertigation rate on the protein components in grains and processing quality of different wheat varieties. [Method] Under the condition of higher soil fertility, different amounts of N-fertilizer were applied in the plots, and then the contents of total protein and its components, percentage of the component content to total protein content as well as the processing quality of grains of two strong-gluten wheat varieties (Linyou145 and Zhengmai9023) and two weak-gluten wheat varieties (Ningmai9 and Baofeng949) were determined. [Result] The contents of total protein and globulin, gliadin and glutenin were improved significantly with the increase of the N-fertilizer amount; but the content of albumin did not show remarkable increase; in addition, the percentage of each protein component was relative stable and did not increase significantly. Increase in the amount of N-fertilizer improved the sedimentation value, wet gluten content, loaf volume and loaf score, decreased the volume weight of grain. [Conclusion] This study provideed theoretical support for high-quality wheat production.展开更多
Field experiments were conducted to assess the impact of various organic sources, inorganicnitrogen (N) and the different combinations of inorganic N (urea) + organic source on the yieldcomponents (YC) and grai...Field experiments were conducted to assess the impact of various organic sources, inorganicnitrogen (N) and the different combinations of inorganic N (urea) + organic source on the yieldcomponents (YC) and grain yield (GY) of hybrid rice (Oryza sativa L., Pukhraj) under rice-wheat system.The experiments were conducted at Batkhela (Malakand), Northwestern Pakistan, in 2011 and 2012.Our results revealed that YC and GY ranked first for the hybrid rice when applied with sole inorganic N(urea), followed by the application of N in mixture (urea + organic sources), while the control plots (no Napplied) ranked in the bottom. Among the six organic sources (three animal manures: poultry, sheepand cattle; three crop residues: onion, berseem and wheat), application of N in the form of poultrymanure was superior in terms of higher YC and GY. When applying 120 kg/hm2 N source, 75% N fromurea + 25% N from organic source resulted in higher YC and GY in 2011, while applying 50% N fromurea + 50% N from organic sources caused higher YC and GY in 2012. Therefore, the combinedapplication of N sources in the form of urea + organic source can produce good performances in termsof higher YC and GY of rice under rice-wheat cropping system.展开更多
Wolfberry(Lycium barbarum L.)is important for health care and ecological protection.However,it faces problems of low productivity and resource utilization during planting.Exploring reasonable models for water and nitr...Wolfberry(Lycium barbarum L.)is important for health care and ecological protection.However,it faces problems of low productivity and resource utilization during planting.Exploring reasonable models for water and nitrogen management is important for solving these problems.Based on field trials in 2021 and 2022,this study analyzed the effects of controlling soil water and nitrogen application levels on wolfberry height,stem diameter,crown width,yield,and water(WUE)and nitrogen use efficiency(NUE).The upper and lower limits of soil water were controlled by the percentage of soil water content to field water capacity(θ_(f)),and four water levels,i.e.,adequate irrigation(W0,75%-85%θ_(f)),mild water deficit(W1,65%-75%θ_(f)),moderate water deficit(W2,55%-65%θ_(f)),and severe water deficit(W3,45%-55%θ_(f))were used,and three nitrogen application levels,i.e.,no nitrogen(N0,0 kg/hm^(2)),low nitrogen(N1,150 kg/hm^(2)),medium nitrogen(N2,300 kg/hm^(2)),and high nitrogen(N3,450 kg/hm^(2))were implied.The results showed that irrigation and nitrogen application significantly affected plant height,stem diameter,and crown width of wolfberry at different growth stages(P<0.01),and their maximum values were observed in W1N2,W0N2,and W1N3 treatments.Dry weight per plant and yield of wolfberry first increased and then decreased with increasing nitrogen application under the same water treatment.Dry weight per hundred grains and dry weight percentage increased with increasing nitrogen application under W0 treatment.However,under other water treatments,the values first increased and then decreased with increasing nitrogen application.Yield and its component of wolfberry first increased and then decreased as water deficit increased under the same nitrogen treatment.Irrigation water use efficiency(IWUE,8.46 kg/(hm^(2)·mm)),WUE(6.83 kg/(hm^(2)·mm)),partial factor productivity of nitrogen(PFPN,2.56 kg/kg),and NUE(14.29 kg/kg)reached their highest values in W2N2,W1N2,W1N2,and W1N1 treatments.Results of principal component analysis(PCA)showed that yield,WUE,and NUE were better in W1N2 treatment,making it a suitable water and nitrogen management mode for the irrigation area of the Yellow River in the Gansu Province,China and similar planting areas.展开更多
The study was conducted to determine the optimum fertilizer-N application rate formaximum seed yields of Zoysiagrass stands from seeding and transplant respectively, atJiaozhou, Shandong Province, China from 2001 to 2...The study was conducted to determine the optimum fertilizer-N application rate formaximum seed yields of Zoysiagrass stands from seeding and transplant respectively, atJiaozhou, Shandong Province, China from 2001 to 2003. In the third year after establishment,seed yields and yield components for both stands showed a similar response to fertilizer-N. Maximum fertile tiller numbers (3342 heads m-2 and 2941 heads m-2 from stands seeded inrows and transplanted, respectively) and the highest seed yields (844.50kgha-1 and 874.65kg ha-1 from stands seeded in rows and transplanted, respectively) were obtained at a Nfertilizer rate of 20kgha-1 in autumn and 10kgha-1 in spring (30kgha-1 N in total). Thefertile tillers and seed yields decreased with further increasing of N fertilizer rate.Fertilizer-N application could increase the length of spike, spikelets per fertiletiller, seed number per spike, setting percentage and thousand seed weight. The 1000-seed weight and the length of spike from transplant plots were higher than that fromseeding plots. The optimal harvest time of zoysiagrass at Jiaozhou was on the 36th dayafter peak anthesis, near June 15th, when the seed moisture content was 26-28%.展开更多
In order to evaluate the effects of soil depth on the contents of soil organic nitrogen,organic nitrogen forms in apple-pear orchard soil profile were quantified using the method proposed by Bremner in 1965.The result...In order to evaluate the effects of soil depth on the contents of soil organic nitrogen,organic nitrogen forms in apple-pear orchard soil profile were quantified using the method proposed by Bremner in 1965.The results indicated that in addition to the amino sugar-N,all the soil organic N components within the same soil layer in wasteland were more than those in apple-pear orchard soil;with the layer depth increasing,the contents of different organic nitrogen forms in apple-pear orchard soil and wasteland were decreased;and the proportion of each organic N component within total hydrolysable N was different,and the percentages of ammonia N and amino acid-N components within total hydrolysable N were higher,especially the percentage of ammonia N components within total hydrolysable N was the highest.展开更多
To study the effects of different levels of nitrogen fertilizer on yield and yield components of cultivars of rainfed wheat a study was done in the crop year 2012-2013 as factorial in a randomized complete block desig...To study the effects of different levels of nitrogen fertilizer on yield and yield components of cultivars of rainfed wheat a study was done in the crop year 2012-2013 as factorial in a randomized complete block design with 3 replications, in 2 research stations of Kohne Kand city in Bojnord and Shirvan dryland research station. The treatments of study contain cultivars of wheat in 4 levels (Rasad, Sabalan, Cross Sabalan and Azar 2) and 4 levels of nitrogen fertilizer (75, 50, 25 and 0 kilograms nitrogen per hectare). The results showed that the yield in Shirvan was significantly higher than that in Bojnoord. Moreover, the impact of cultivar and nitrogen on yield and yield components was significant in both regions and among different cultivars Azar 2 has the highest yield in both regions and the lowest yield was for cross Sabalsn in Shirvan and Sabalan in Bojnoord. Furthermore, yield increased by increasing the nitrogen in both regions but there was no significant difference between levels 50 and 75 kilograms per hectare. Among yield components except the number of spikes per square meter, others had a high correlation with yield.展开更多
Nitrogen (N) was applied at rates of 0, 100, 200 and 300 kg.ha^-1 and boron (B) was applied as foliar at rates 0, 500 and 1000 g.ha^-1 to study the effect of different application rates of nitrogen and boron ferti...Nitrogen (N) was applied at rates of 0, 100, 200 and 300 kg.ha^-1 and boron (B) was applied as foliar at rates 0, 500 and 1000 g.ha^-1 to study the effect of different application rates of nitrogen and boron fertilizers on yield, yield components and fiber properties of cotton. Statistical results of study showed that N application significantly (P 〈 0.05) enhanced boll number, boll weight, seed cotton weight of boll, seed cotton yield and lint yield. Results of study also indicated that the maximum seed cotton yield was recorded in case of 200 kg.ha^-1 N application rate, and this application rate resulted in 19.6% increased seed cotton yield. Statistical results also indicated that foliar application of B significantly enhanced boll number, boll weight, seed cotton yield and lint yield. Results also demonstrated that the maximum seed cotton yield was obtained in case of 1000 g.hal foliar application of B, and this foliar application rate resulted in 25% increased seed cotton yield. Statistical results showed that effect of different application rates of N was not significant for all fiber properties (fiber length, fiber strength and fiber fineness). Conversely, results of study indicated that different application rates of B significantly affected some fiber properties.展开更多
针对河西绿洲灌区水资源短缺、玉米田氮肥施用量高等生产生态问题,在节水减氮条件下,分析增加种植密度补偿水氮减量导致玉米减产的效应,为水氮节约型玉米高效生产提供理论依据与技术支撑。基于2016年布设的裂裂区田间试验,主区为2种灌...针对河西绿洲灌区水资源短缺、玉米田氮肥施用量高等生产生态问题,在节水减氮条件下,分析增加种植密度补偿水氮减量导致玉米减产的效应,为水氮节约型玉米高效生产提供理论依据与技术支撑。基于2016年布设的裂裂区田间试验,主区为2种灌水定额:灌水减量20%(W1,3240 m^(3) hm^(–2))和传统灌水(W2,4050 m^(3) hm^(–2)),裂区为2种施氮量:减量施氮25%(N1,270 kg hm^(–2))和传统施氮(N2,360 kg hm^(–2)),裂裂区为3种玉米密度:传统种植密度(D1,7.50万株hm^(–2))、增密30%(D2,9.75万株hm^(–2))和增密60%(D3,12.00万株hm^(–2)),通过测定2020—2021年玉米籽粒产量和生物产量,分析干物质积累及其分配、转运特征,量化产量构成因素,明确增密对水氮减量玉米产量的补偿效应及机制。研究表明,减水、减氮降低了玉米籽粒产量和生物产量,而增密30%能够补偿因水氮同步减量造成的产量负效应,且维持较高的施氮量有利于玉米增产节水。W1N1D1(减量灌水减量施氮及传统密度)较W2N2D1(对照:传统灌水传统施氮及传统密度)籽粒产量和生物产量分别降低9.1%~15.0%与10.0%~11.0%,但W1N1D2(减量灌水减量施氮及增密30%)与W2N2D1差异不显著。W1N2D2(减量灌水传统施氮及增密30%)较W2N2D1籽粒和生物产量分别提高12.9%~15.4%与6.4%~12.0%。增密30%能够补偿水氮同步减量造成玉米减产的主要原因是W1N1D2能增加玉米穗数,进而提高玉米灌浆初期至成熟期干物质积累量和苗期到大喇叭口期群体生长速率及花前转运率。增密30%在灌水减量和传统施氮条件下促进玉米增产的主要原因是W1N2D2可增加玉米穗数,提高玉米生育期干物质积累量与群体生长速率,促进穗部干物质分配,提高花前转运量、转运率及转运贡献率。因此,增密30%是绿洲灌区水氮同步减量玉米稳产高产的可行措施,是氮肥不减但减水20%玉米节水增产有效举措。展开更多
近年来,近红外光谱技术在作物样品组分检测和育种材料快速筛选等方面得到广泛应用,而关于水稻源库器官,尤其是水稻节间主要碳氮代谢组分高通量检测的研究鲜见报道。本研究以试验获得的576份代表性节间样本为材料,在获得样本化学实测值...近年来,近红外光谱技术在作物样品组分检测和育种材料快速筛选等方面得到广泛应用,而关于水稻源库器官,尤其是水稻节间主要碳氮代谢组分高通量检测的研究鲜见报道。本研究以试验获得的576份代表性节间样本为材料,在获得样本化学实测值的基础上,采集样本的近红外光谱信息,并利用偏最小二乘(partial least square,PLS)法构建水稻节间主要碳氮代谢组分蔗糖、淀粉、总氮模型。模型验证结果显示:水稻节间蔗糖、淀粉、总氮含量PLS模型验证集决定系数分别为0.988、0.977和0.957,相对分析误差均大于3,模型的性能指数分别为85.20、85.80和86.50,表明所建模型预测结果准确可靠。此外,水稻叶片和叶鞘的淀粉、总氮含量和碳氮比的PLS模型也具有较高的精度。本研究构建了水稻节间主要碳氮代谢组分的近红外光谱模型,为水稻栽培生理和高产栽培理论研究提供了技术支撑。展开更多
基金Supported by the Special Program for Wheat Grain Quality Stability from Ministry of Agriculture of China(070101)the National Key Technologies R&D Program of China during the 10th Five-Year Plan Period(2004BA520A12-4)~~
文摘[Objective] This study aimed to explore the effects of nitrogen fertigation rate on the protein components in grains and processing quality of different wheat varieties. [Method] Under the condition of higher soil fertility, different amounts of N-fertilizer were applied in the plots, and then the contents of total protein and its components, percentage of the component content to total protein content as well as the processing quality of grains of two strong-gluten wheat varieties (Linyou145 and Zhengmai9023) and two weak-gluten wheat varieties (Ningmai9 and Baofeng949) were determined. [Result] The contents of total protein and globulin, gliadin and glutenin were improved significantly with the increase of the N-fertilizer amount; but the content of albumin did not show remarkable increase; in addition, the percentage of each protein component was relative stable and did not increase significantly. Increase in the amount of N-fertilizer improved the sedimentation value, wet gluten content, loaf volume and loaf score, decreased the volume weight of grain. [Conclusion] This study provideed theoretical support for high-quality wheat production.
基金supported by the Higher Education Commission(HEC)of Pakistan,Islamabad
文摘Field experiments were conducted to assess the impact of various organic sources, inorganicnitrogen (N) and the different combinations of inorganic N (urea) + organic source on the yieldcomponents (YC) and grain yield (GY) of hybrid rice (Oryza sativa L., Pukhraj) under rice-wheat system.The experiments were conducted at Batkhela (Malakand), Northwestern Pakistan, in 2011 and 2012.Our results revealed that YC and GY ranked first for the hybrid rice when applied with sole inorganic N(urea), followed by the application of N in mixture (urea + organic sources), while the control plots (no Napplied) ranked in the bottom. Among the six organic sources (three animal manures: poultry, sheepand cattle; three crop residues: onion, berseem and wheat), application of N in the form of poultrymanure was superior in terms of higher YC and GY. When applying 120 kg/hm2 N source, 75% N fromurea + 25% N from organic source resulted in higher YC and GY in 2011, while applying 50% N fromurea + 50% N from organic sources caused higher YC and GY in 2012. Therefore, the combinedapplication of N sources in the form of urea + organic source can produce good performances in termsof higher YC and GY of rice under rice-wheat cropping system.
基金funded by the National Natural Science Foundation of China(51969003)the Key Research and Development Project of Gansu Province(22YF7NA110)+4 种基金the Discipline Team Construction Project of Gansu Agricultural Universitythe Gansu Agricultural University Youth Mentor Support Fund Project(GAU-QDFC-2022-22)the Innovation Fund Project of Higher Education in Gansu Province(2022B-101)the Research Team Construction Project of College of Water Conservancy and Hydropower Engineering,Gansu Agricultural University(Gaucwky-01)the Gansu Water Science Experimental Research and Technology Extension Program(22GSLK023)。
文摘Wolfberry(Lycium barbarum L.)is important for health care and ecological protection.However,it faces problems of low productivity and resource utilization during planting.Exploring reasonable models for water and nitrogen management is important for solving these problems.Based on field trials in 2021 and 2022,this study analyzed the effects of controlling soil water and nitrogen application levels on wolfberry height,stem diameter,crown width,yield,and water(WUE)and nitrogen use efficiency(NUE).The upper and lower limits of soil water were controlled by the percentage of soil water content to field water capacity(θ_(f)),and four water levels,i.e.,adequate irrigation(W0,75%-85%θ_(f)),mild water deficit(W1,65%-75%θ_(f)),moderate water deficit(W2,55%-65%θ_(f)),and severe water deficit(W3,45%-55%θ_(f))were used,and three nitrogen application levels,i.e.,no nitrogen(N0,0 kg/hm^(2)),low nitrogen(N1,150 kg/hm^(2)),medium nitrogen(N2,300 kg/hm^(2)),and high nitrogen(N3,450 kg/hm^(2))were implied.The results showed that irrigation and nitrogen application significantly affected plant height,stem diameter,and crown width of wolfberry at different growth stages(P<0.01),and their maximum values were observed in W1N2,W0N2,and W1N3 treatments.Dry weight per plant and yield of wolfberry first increased and then decreased with increasing nitrogen application under the same water treatment.Dry weight per hundred grains and dry weight percentage increased with increasing nitrogen application under W0 treatment.However,under other water treatments,the values first increased and then decreased with increasing nitrogen application.Yield and its component of wolfberry first increased and then decreased as water deficit increased under the same nitrogen treatment.Irrigation water use efficiency(IWUE,8.46 kg/(hm^(2)·mm)),WUE(6.83 kg/(hm^(2)·mm)),partial factor productivity of nitrogen(PFPN,2.56 kg/kg),and NUE(14.29 kg/kg)reached their highest values in W2N2,W1N2,W1N2,and W1N1 treatments.Results of principal component analysis(PCA)showed that yield,WUE,and NUE were better in W1N2 treatment,making it a suitable water and nitrogen management mode for the irrigation area of the Yellow River in the Gansu Province,China and similar planting areas.
基金The study was supported by 948 Project sponsored by the Ministry of Agriculture,China(202099).
文摘The study was conducted to determine the optimum fertilizer-N application rate formaximum seed yields of Zoysiagrass stands from seeding and transplant respectively, atJiaozhou, Shandong Province, China from 2001 to 2003. In the third year after establishment,seed yields and yield components for both stands showed a similar response to fertilizer-N. Maximum fertile tiller numbers (3342 heads m-2 and 2941 heads m-2 from stands seeded inrows and transplanted, respectively) and the highest seed yields (844.50kgha-1 and 874.65kg ha-1 from stands seeded in rows and transplanted, respectively) were obtained at a Nfertilizer rate of 20kgha-1 in autumn and 10kgha-1 in spring (30kgha-1 N in total). Thefertile tillers and seed yields decreased with further increasing of N fertilizer rate.Fertilizer-N application could increase the length of spike, spikelets per fertiletiller, seed number per spike, setting percentage and thousand seed weight. The 1000-seed weight and the length of spike from transplant plots were higher than that fromseeding plots. The optimal harvest time of zoysiagrass at Jiaozhou was on the 36th dayafter peak anthesis, near June 15th, when the seed moisture content was 26-28%.
文摘In order to evaluate the effects of soil depth on the contents of soil organic nitrogen,organic nitrogen forms in apple-pear orchard soil profile were quantified using the method proposed by Bremner in 1965.The results indicated that in addition to the amino sugar-N,all the soil organic N components within the same soil layer in wasteland were more than those in apple-pear orchard soil;with the layer depth increasing,the contents of different organic nitrogen forms in apple-pear orchard soil and wasteland were decreased;and the proportion of each organic N component within total hydrolysable N was different,and the percentages of ammonia N and amino acid-N components within total hydrolysable N were higher,especially the percentage of ammonia N components within total hydrolysable N was the highest.
文摘To study the effects of different levels of nitrogen fertilizer on yield and yield components of cultivars of rainfed wheat a study was done in the crop year 2012-2013 as factorial in a randomized complete block design with 3 replications, in 2 research stations of Kohne Kand city in Bojnord and Shirvan dryland research station. The treatments of study contain cultivars of wheat in 4 levels (Rasad, Sabalan, Cross Sabalan and Azar 2) and 4 levels of nitrogen fertilizer (75, 50, 25 and 0 kilograms nitrogen per hectare). The results showed that the yield in Shirvan was significantly higher than that in Bojnoord. Moreover, the impact of cultivar and nitrogen on yield and yield components was significant in both regions and among different cultivars Azar 2 has the highest yield in both regions and the lowest yield was for cross Sabalsn in Shirvan and Sabalan in Bojnoord. Furthermore, yield increased by increasing the nitrogen in both regions but there was no significant difference between levels 50 and 75 kilograms per hectare. Among yield components except the number of spikes per square meter, others had a high correlation with yield.
文摘Nitrogen (N) was applied at rates of 0, 100, 200 and 300 kg.ha^-1 and boron (B) was applied as foliar at rates 0, 500 and 1000 g.ha^-1 to study the effect of different application rates of nitrogen and boron fertilizers on yield, yield components and fiber properties of cotton. Statistical results of study showed that N application significantly (P 〈 0.05) enhanced boll number, boll weight, seed cotton weight of boll, seed cotton yield and lint yield. Results of study also indicated that the maximum seed cotton yield was recorded in case of 200 kg.ha^-1 N application rate, and this application rate resulted in 19.6% increased seed cotton yield. Statistical results also indicated that foliar application of B significantly enhanced boll number, boll weight, seed cotton yield and lint yield. Results also demonstrated that the maximum seed cotton yield was obtained in case of 1000 g.hal foliar application of B, and this foliar application rate resulted in 25% increased seed cotton yield. Statistical results showed that effect of different application rates of N was not significant for all fiber properties (fiber length, fiber strength and fiber fineness). Conversely, results of study indicated that different application rates of B significantly affected some fiber properties.
文摘针对河西绿洲灌区水资源短缺、玉米田氮肥施用量高等生产生态问题,在节水减氮条件下,分析增加种植密度补偿水氮减量导致玉米减产的效应,为水氮节约型玉米高效生产提供理论依据与技术支撑。基于2016年布设的裂裂区田间试验,主区为2种灌水定额:灌水减量20%(W1,3240 m^(3) hm^(–2))和传统灌水(W2,4050 m^(3) hm^(–2)),裂区为2种施氮量:减量施氮25%(N1,270 kg hm^(–2))和传统施氮(N2,360 kg hm^(–2)),裂裂区为3种玉米密度:传统种植密度(D1,7.50万株hm^(–2))、增密30%(D2,9.75万株hm^(–2))和增密60%(D3,12.00万株hm^(–2)),通过测定2020—2021年玉米籽粒产量和生物产量,分析干物质积累及其分配、转运特征,量化产量构成因素,明确增密对水氮减量玉米产量的补偿效应及机制。研究表明,减水、减氮降低了玉米籽粒产量和生物产量,而增密30%能够补偿因水氮同步减量造成的产量负效应,且维持较高的施氮量有利于玉米增产节水。W1N1D1(减量灌水减量施氮及传统密度)较W2N2D1(对照:传统灌水传统施氮及传统密度)籽粒产量和生物产量分别降低9.1%~15.0%与10.0%~11.0%,但W1N1D2(减量灌水减量施氮及增密30%)与W2N2D1差异不显著。W1N2D2(减量灌水传统施氮及增密30%)较W2N2D1籽粒和生物产量分别提高12.9%~15.4%与6.4%~12.0%。增密30%能够补偿水氮同步减量造成玉米减产的主要原因是W1N1D2能增加玉米穗数,进而提高玉米灌浆初期至成熟期干物质积累量和苗期到大喇叭口期群体生长速率及花前转运率。增密30%在灌水减量和传统施氮条件下促进玉米增产的主要原因是W1N2D2可增加玉米穗数,提高玉米生育期干物质积累量与群体生长速率,促进穗部干物质分配,提高花前转运量、转运率及转运贡献率。因此,增密30%是绿洲灌区水氮同步减量玉米稳产高产的可行措施,是氮肥不减但减水20%玉米节水增产有效举措。
文摘近年来,近红外光谱技术在作物样品组分检测和育种材料快速筛选等方面得到广泛应用,而关于水稻源库器官,尤其是水稻节间主要碳氮代谢组分高通量检测的研究鲜见报道。本研究以试验获得的576份代表性节间样本为材料,在获得样本化学实测值的基础上,采集样本的近红外光谱信息,并利用偏最小二乘(partial least square,PLS)法构建水稻节间主要碳氮代谢组分蔗糖、淀粉、总氮模型。模型验证结果显示:水稻节间蔗糖、淀粉、总氮含量PLS模型验证集决定系数分别为0.988、0.977和0.957,相对分析误差均大于3,模型的性能指数分别为85.20、85.80和86.50,表明所建模型预测结果准确可靠。此外,水稻叶片和叶鞘的淀粉、总氮含量和碳氮比的PLS模型也具有较高的精度。本研究构建了水稻节间主要碳氮代谢组分的近红外光谱模型,为水稻栽培生理和高产栽培理论研究提供了技术支撑。