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带状玉米田钾肥试验
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作者 张付莲 《青海农林科技》 2008年第3期60-61,共2页
钾肥试验表明,青海地区虽然钾肥含量高,但还是难以满足带状玉米的需要,如果要增加带状玉米产量还得补充钾,且钾肥的最佳施量是300kg.hm-2。
关键词 带状玉米 钾肥施量 最佳钾胞施量 试验
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Effects of Nitrogen,Phosphorus and Potassium Application on Growth and Dry Matter Accumulation in Mulberry 被引量:1
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作者 刘刚 黄盖群 +5 位作者 殷浩 张建华 朱永群 危玲 佟万红 林超文 《Agricultural Science & Technology》 CAS 2013年第6期899-904,共6页
In this paper, the effect of different fertilizer treatments on the main indexes of growth and development and dry matter accumulation of perennial mulberry, which is cut and pruned in summer, were studied with ‘3414... In this paper, the effect of different fertilizer treatments on the main indexes of growth and development and dry matter accumulation of perennial mulberry, which is cut and pruned in summer, were studied with ‘3414’ field experiment design. The results showed that N, P, and K at proper amounts could promote mulberry growth and development, improve its dry matter content, increase its dry matter accumulation. The effects of N, P, K on leaf yield per plant were respectively expressed as follows: N2 N3 N1 N0 , P2 P1 P3 P0 , K2 K1 K3 K0 . It can be concluded that the recommended fertilizer amounts of dry matter accumulations in mulberry leaf were 694.36 kg/hm2 of N, 198.15 kg/hm2 of P, and 274.26 kg/hm2 of K and the dry matter achieved the maximum at 8 045.04 kg/hm2 . The recommended fertilizer amounts of accumulated dry matter in branch were 1 000.05 kg/hm2 of N, 242.04 kg/hm2 of P, and 218.01 kg/hm 2 of K, and the dry matter achieved the maximum at 5 969.05 kg/hm2 . The recommended fertilizer amount in young shoots were 883.76 kg/hm2 of N, 204.48 kg/hm2 of P and 426.59 kg/hm2 of K and dry matter achieved the maximum at 1 410.24 kg/hm2 . This paper could provide reference for the construction of highly-qualified mulberry field in Sichuan hilly area. 展开更多
关键词 MULBERRY N P and K Fertilization Fertilizer amount Growth and development Dry matter accumulation
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Effects of Potassium Fertilizing Rates on Yield, Fiber Quality and Potassium Use Efficiency of Three Hybrid Cotton Cultivars 被引量:1
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作者 冯正锐 刘爱玉 +3 位作者 易九红 李瑞莲 王欣悦 邹茜 《Agricultural Science & Technology》 CAS 2014年第2期200-204,共5页
The effects of potassium (K) application rates on the yield, fiber quality and K fertilizer use efficiency of three hybrid cotton varieties (Jin102, Xiangzamian8, Siyang328) were studied in field experiment. Ferti... The effects of potassium (K) application rates on the yield, fiber quality and K fertilizer use efficiency of three hybrid cotton varieties (Jin102, Xiangzamian8, Siyang328) were studied in field experiment. Fertilizer rates of K2O 135 and 270 kg/hm2, representing 1x and 2x recommended K rates, were applied, no application of k fertilizer as the CK. The results show that the lint yield increased 39.13%-57.48%with potassium application, highly significantly. Al yield components of the three hy-brid cotton varieties increased with the increase of K application amounts. The bol number per plant, single bol weight and lint percentage were increased by 14.24%-40.29%, 3.59%-15.51% and 0.16%-4.89%, respectively, and the fiber length and specific strength also increased with the increasing K application amounts, showing no significant influence on Micronaire. When the K application amounts increased from 135 to 270 kg/hm2, the partial factor productivity (PFPk) reduced by 45.93%-48.01%, and the agronomic efficiency (AEk) reduced by 37.1%-42.9%. The PFPk and KE (K efficiency coefficients) of S328 were the highest among the three varieties, which also showed the strongest resistance to low potassium stress, and with no potassi-um fertilizer application (K0), the lint yield of S328 was 5.54% and 11.19% higher than that of X8 and J102. The AEk of J102 was the highest, and its reward of K fertilizer was the greatest among the three varieties. 展开更多
关键词 Hybrid cotton Amount of Potassium Fertilizer Application YIELD Quality K use efficiency
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Effects of Nitrogen and Potassium Fertigation on Yield and Quality of Pineapple during Late Growing Period
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作者 臧小平 何应对 +2 位作者 孙光明 魏长宾 张承林 《Agricultural Science & Technology》 CAS 2013年第2期298-301,310,共5页
[Objective] The aim was to compare effects of nitrogen and potassium fertigation on yield and quality of pineapple during the late growing period. [Method] Urea, potassium sulfate, and potassium chloride were taken as... [Objective] The aim was to compare effects of nitrogen and potassium fertigation on yield and quality of pineapple during the late growing period. [Method] Urea, potassium sulfate, and potassium chloride were taken as three fertilizers which were set at three levels, respectively, and the group without additional fertilizers was taken as control group. [Result] Compared with control group, weight of individual pineapple was significantly increased by fertigation of urea at 7.5 kg or potassium sulfate at 18 kg per 667 m 2 and the increase yields were 22.5% and 28.9%, respectively. Effects of nitrogen and potassium fertigation on yield and quality of pineapple were compared. [Conclusion] Potassium sulfate fertigation would promote sugar accumulation and improve quality of fruits. Furthermore, chlorophyll content can be enhanced and photosynthetic capacity can be reinforced. 展开更多
关键词 FERTIGATION NITROGEN POTASSIUM Yield Quality PINEAPPLE
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Evolution of Nitrogen, Phosphorus and Potassium Fertilizer Application Rates in Cotton Fields and Its Influences on Cotton Yield in the Yangtze River Valley
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作者 Naiyin XU Jian LI 《Agricultural Science & Technology》 CAS 2014年第10期1727-1729,1792,共4页
[Objective] The historical evolution pattern of nitrogen (N), phosphorus (P) and potassium (K) fertilizer application rate and its effects on lint cotton yield were explored to provide the theoretical basis for ... [Objective] The historical evolution pattern of nitrogen (N), phosphorus (P) and potassium (K) fertilizer application rate and its effects on lint cotton yield were explored to provide the theoretical basis for reasonable fertilizer management strate-gy in the cotton planting region of the Yangtze River Val ey. [Method] GGE biplot analysis method was adopted to analyze the correlation among N, P and K fertilizer application rate and lint cotton yield with the dataset of national cotton regional trials of the Yangtze River Val ey during 1991-2013. The linear and nonlinear regression analysis method was used to reveal the evolution of the fertilizer applying patterns, and analyze the effects of N, P, K application rates on cotton lint yield. [Result] The application rates of N, P and K fertilizer presented highly significant positive corre-lation with lint cotton yield, among which the potassium fertilizer was the strongest relative factor with lint cotton yield, fol owed by phosphorus fertilizer, while nitrogen fertilizer was the weakest factor. The application rate of nitrogen fertilizer was relat-ed with the test year in the pattern of a quadratic function, while phosphate and potassium had progressive increase linear relation with the test year in the cotton planting region of the Yangtze River Val ey. Meanwhile, cotton lint yield was in re-sponse to nitrogen fertilizer content increase with a quadratic parabola function, and increased with the applying phosphate fertilizer and potassium fertilizer content with linearly increasing function. [Conclusion] The increasing application amount of N, P and K fertilizer was general y beneficial to cotton yield improvements, however, ex-orbitant applying nitrogen fertilizer was unfavorable for cotton production, and a reasonable mixture formula of N, P and K fertilizer was better in terms of cotton yield-increasing effect. 展开更多
关键词 Cotton (Gossypium hirsutum L.) GGE biplot Nitrogen phosphorus andpotassium fertilizer The Yangtze River Valley
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Effect of Long-Term Potassium Fertilization on Crop Yield and Potassium Efficiency and Balance Under Wheat-Maize Rotation in China 被引量:25
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作者 ZHANG Hui-Min YANG Xue-Yun +4 位作者 HE Xin-Hua XU Ming-Gang HUANG Shao-Min LIU Hua WANG Bo-Ren 《Pedosphere》 SCIE CAS CSCD 2011年第2期154-163,共10页
Sustainable potassium (K) management at different soil sites requires understanding the relationships between crop productivity and long-term K fertilizations on a regional or national scale. We analyzed responses o... Sustainable potassium (K) management at different soil sites requires understanding the relationships between crop productivity and long-term K fertilizations on a regional or national scale. We analyzed responses of grain yield of wheat (Triticum aestivurn L.) and maize (Zea mays L.), K efficiency, and partial balance (difference between K input through fertilizer and K output in the aboveground biomass) during 15- (1990-2005) or 18-year (1990-2008) K fertilizations at five distinctive agroecologicai zones across China. Compared to the inorganic nitrogen (N) and phosphorus (P) fertilization, the inorganic NPK fertilization significantly increased grain yields of wheat (21%) and maize (16% 72%) at Qiyang and Changping, where soils have low exchangeable and non-exchangeable K contents, but not at Uriimqi, Yangling and Zhengzhou, where soils have a high exchangeable and non-exchangeable K and/or low N/K ratio in crop plants. Compared to the inorganic NPK fertilization, the inorganic NPK (30% N) and organic manure (70~~ N) fertilization (NPKM) increased grain yields of wheat (14%-40%) and maize (9%-6170) at four sites, but not at Zhengzhou. For a productivity of wheat at 2-5 t ha-1 or maize at 3-6 t ha 1, 13-26 or 9-17 kg K ha 1 were required to produce 1.0 t wheat or maize. The NP fertilization resulted in the lowest negative partial K balance and accumulated 52 kg K ha-1 year-1 less than the NPK fertilization, which accumulated 28 kg ha 1 year-1 less K than the NPKM fertilization. A re-evaluation of the site-specific fertilization effects on N/K ratio in crop plants and soil K accumulation under current NPK and NPKM t'ertilization is urgently needed to increase both crop yield and K use efficiency at different agroecologicai zones across China. 展开更多
关键词 exchangeable K internal K use efficiency K harvest index K uptake non-exchangeable K
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