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Studies on the Fertilization Effect and Optimal Fertilizing Amount of Brazil Banana Based on "3414" Field Trials
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作者 刘永霞 井涛 +6 位作者 唐粉玲 臧小平 郑伟 曹红鑫 鞠俊杰 王必尊 李昌鹏 《Agricultural Science & Technology》 CAS 2015年第9期1950-1954,共5页
Fertilizer effect model such as ternary quadratic, unary quadratic, straight line and platform model was respectively used to analyze the two-year "3414" test data collected from banana garden in Fushan Town of Hain... Fertilizer effect model such as ternary quadratic, unary quadratic, straight line and platform model was respectively used to analyze the two-year "3414" test data collected from banana garden in Fushan Town of Hainan Province. The results showed that the optimal fertilizing amount of ternary quadratic model simulation was0.374 kg/plant of N, 0.289 kg/plant of P2O5 and 0.891 kg/plant of K2 O. According to the yield trend characteristic, the optimal fertilizing amount of unary quadratic model was 0.400kg/plant of N, 0.214 kg/plant of P2O5 and 0.901kg/plant of K2 O. Thus it can be seen that only partial indices of the optimal fertilizing amount of ternary quadratic model simulation were higher than that of unary quadratic model. Considering the results, the optimal fertilizing amount of Brazil banana was 0.374-0.400kg/plant of N, 0.214-0.289 kg/plant of P2O5 and 0.891-0.901 kg/plant of K2 O. 展开更多
关键词 Brazil banana "3414" test the optimal fertilizing amount fertilizer effect model
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Optimal nitrogen fertilization of boreal conifer forest 被引量:1
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作者 Timo Pukkala 《Forest Ecosystems》 SCIE CSCD 2017年第2期123-132,共10页
Background: Forest fertilization offers a means to increase the production of renewable resources.Nitrogen is the most common fertilizer in boreal upland forests.There is plenty of research on the effect of nitrogen ... Background: Forest fertilization offers a means to increase the production of renewable resources.Nitrogen is the most common fertilizer in boreal upland forests.There is plenty of research on the effect of nitrogen fertilization on volume growth, but less research on the optimal timing of fertilization and optimal management of fertilized stands.Methods: This study used simulation and optimization to analyze the profitability of fertilization, optimal management of fertilized stands and the effects of fertilization on cash flows and timber yields.The management of 100 stands representing the most common growing sites of Scots pine and Norway spruce was optimized.Results: Fertilization improved profitability in most of the analyzed stands.Profitability improved most in spruce stands growing on mesic site.Improving stem quality increased the economic benefit of fertilization.The timber yields of medium-aged conifer stands can be increased by almost 1 m^3·ha^(-1)·a^(-1)(15%) in sub-xeric pine and mesic spruce sites and about 0.5 m^3·ha^(-1)·a^(-1)(5%) in mesic pine and herb-rich spruce sites when the recommended nitrogen dose(150kg·ha^(-1)) is applied once in 30 years.Conclusions: Nitrogen fertilization of boreal conifer forest should be used mainly in spruce-dominated stands growing on medium sites.The gains are the highest in stands where the mean tree diameter is 16–20 cm and stand basal area is 14–20 m^2·ha^(-1). 展开更多
关键词 Forest fertilization optimal management Response model
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Nitrogen, Phosphorus, and Potassium Interactive Effects for Improving Drought Resistance on Mung Bean Varieties
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作者 Zhichao Yin Yuhua He +3 位作者 Yurong Zhang Wenyun Guo Xiangli Xie Fengxiang Yin 《American Journal of Plant Sciences》 CAS 2024年第9期777-795,共19页
The planting areas of mung bean are mostly arid and semi-arid areas, and lack of irrigation conditions. Many studies have reported that fertilization can increase drought resistance. In our previous research, optimize... The planting areas of mung bean are mostly arid and semi-arid areas, and lack of irrigation conditions. Many studies have reported that fertilization can increase drought resistance. In our previous research, optimized nitrogen (N), phosphorus (P) and potassium (K) combined fertilization model was established in mung bean. In the present study, the optimal fertilization was conducted in pot trails, and mung bean varieties Bailv9 and Bailv11 were used as materials, while the four water regimes, and three fertilization ratios of F120 (optimal fertilization), F100 (conventional fertilization), F50 (half of conventional fertilization) treatments were set, to compare each fertilization ratio effects and non-fertilization condition under each water regimes respectively. Under different water conditions, the investigation of N, P, and K effects of optimal fertilization showed that the yield of Bailv9 was not sensitive to water stress and had strong drought resistance;their water sensitivity index and drought resistance coefficient were BaiLv9 as Di = 0.89 and DC = 0.79. The yield of Bailv11 was sensitive to water stress, and their drought resistance was weak;their water sensitivity index and drought resistance coefficient were BL11 Di = 1.76 DC = 0.59, and under different water treatment conditions, Bailv9 and Bailv11 all had the best yield and other related traits increase in the F120 fertilization mode compared with other fertilization and non-fertilization conditions, and the average yield increases were 31.56% and 28.08%, respectively. The pot trails conduct the drought stress treatments in mung bean varieties Bailv9, Bailv11, Bailv935 and Bailv985 to determine the function of NPK optimized fertilization for improving plants growth in drought stress condition. Compared with the mung bean varieties treated with F50, F100, and F120, the yield of Bailv9 increased by 56.20%, 81.27%, and 107.22%, respectively;compared with that of F0, the yield of Bailv11 increased by 10.18%, 19.42%, and 45.88%, respectively;Bailv935 increased by 26.52%, 61.90%, 74.16% respectively, and Bailv985 increased by 23.78%, 56.92%, 87.62% respectively. The significant performances of optimized fertilization were also verified in 20 mung bean varieties in our filed trails. The research establishes a theoretical basis for introducing the model into production practice in the next step. 展开更多
关键词 Mung Bean Water Sensitivity fertilization Sensitivity optimal fertilization Drought Improvement
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An Improved Farmland Fertility Algorithm with Hyper-Heuristic Approach for Solving Travelling Salesman Problem
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作者 Farhad Soleimanian Gharehchopogh Benyamin Abdollahzadeh Bahman Arasteh 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第6期1981-2006,共26页
Travelling Salesman Problem(TSP)is a discrete hybrid optimization problem considered NP-hard.TSP aims to discover the shortest Hamilton route that visits each city precisely once and then returns to the starting point... Travelling Salesman Problem(TSP)is a discrete hybrid optimization problem considered NP-hard.TSP aims to discover the shortest Hamilton route that visits each city precisely once and then returns to the starting point,making it the shortest route feasible.This paper employed a Farmland Fertility Algorithm(FFA)inspired by agricultural land fertility and a hyper-heuristic technique based on the Modified Choice Function(MCF).The neighborhood search operator can use this strategy to automatically select the best heuristic method formaking the best decision.Lin-Kernighan(LK)local search has been incorporated to increase the efficiency and performance of this suggested approach.71 TSPLIB datasets have been compared with different algorithms to prove the proposed algorithm’s performance and efficiency.Simulation results indicated that the proposed algorithm outperforms comparable methods of average mean computation time,average percentage deviation(PDav),and tour length. 展开更多
关键词 Travelling salesman problem optimization farmland fertility optimization algorithm Lin-Kernighan
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Optimizing N fertilizer use for sesame under rain fed and irrigation conditions in Northern Ethiopia
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作者 Zenawi Gebregergis Fiseha Baraki Goitom Teame 《Oil Crop Science》 CSCD 2023年第4期252-258,共7页
Inappropriate use of fertilizers is one of the major production constraints in sesame. Studies on N fertilizer optimization on sesame were conducted at Humera Agricultural Research Center(Hu ARC) under rain fed and ir... Inappropriate use of fertilizers is one of the major production constraints in sesame. Studies on N fertilizer optimization on sesame were conducted at Humera Agricultural Research Center(Hu ARC) under rain fed and irrigation conditions. Thirteen(13) N doses were evaluated in a Randomized Complete Block Design(RCBD)during 2016–2018 for rainfed conditions and 2017 to 2019 for irrigation conditions. The study was conducted with objective to optimize N fertilizer use for sesame. In the rainfed condition, the results demonstrated a prolonged duration to reach 50% flowering with higher nitrogen(N) application rates. The application of 52.5–110kg N ha^(-1) resulted in significantly higher seed yield, while lower(18 kg N ha^(-1)) and higher(156 kg N ha^(-1)) doses of N led to reduced seed yield. Under irrigation conditions, superior seed weights and maximum seed yield were observed at 64 and 75 kg N ha^(-1), whereas lower N doses resulted in diminished seed yield. The agronomic efficiency of N fertilizer(N-AE) was found to be highest at the rate of 64 kg N ha^(-1) under both growing conditions.The partial budget analysis revealed that applying 64 kg N ha^(-1) for rainfed cultivation and between 64 and 75 kg N ha^(-1) for irrigated sesame production yielded greater net profit, MRR, and residual ranking. Therefore, it is recommended to apply a rate of 64 kg N ha^(-1) for rainfed sesame cultivation and between 64 up to 75 kg N ha^(-1) for the irrigated sesame inorder to increase the productivity of this crop. 展开更多
关键词 SESAME N agronomic efficiency N fertilizer optimization Sesame productivity and seed yield
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Effect of water and fertilizer coupling optimization test on water use efficiency of rice in black soil regions 被引量:4
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作者 LIN Yanyu ZHANG Zhongxue +1 位作者 XU Dan NIE Tangzhe 《排灌机械工程学报》 EI CSCD 北大核心 2016年第2期151-156,共6页
How to improve the water use efficiency of rice in black soil regions was studied. The black soil region in paddy fields was chosen as the research object. The research showed the fertilizer coupling mathematical mode... How to improve the water use efficiency of rice in black soil regions was studied. The black soil region in paddy fields was chosen as the research object. The research showed the fertilizer coupling mathematical model with N,P,K,irrigation water( W) and water use efficiency( WUE),which was set up under the condition of controlled irrigation with quadratic D- 416 optimized saturation design. The results show that the decending order of single factor' s influence on the WUE was N,K,P and W. All the interactions between N&P,N&K,N&W,K&P,P&W and K&W on the WUE were raised initially,and when reached a certain value,they began to decline. The decending order of each interaction on the WUE was K&P,K&W,N&K,N&P,P&W and N&W. When the WUE was targeted within 1. 8- 2. 5 kg / km^3,an optimized proportion plan was obtained in the 95% confidence interval,i. e. N 87. 76- 103. 32 kg / hm^2,K_2 O 52. 37- 66. 53 kg / hm^2 and P_2O_536. 80- 46. 71 kg / hm^2. Furthermore,the late tillering of the soil moisture content was 70. 07%- 72. 57% of the saturated moisture content. 展开更多
关键词 black soil RICE controlled irrigation water and fertilizer optimization plan WUE
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Quantity of Fertilizer for a New Late-maturing Heading Mustard(Brassica juncea) Cultivar Yongbao 2 at the Heading Stage 被引量:1
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作者 孟秋峰 王毓洪 +3 位作者 陈承 王洁 任锡亮 王旭强 《Agricultural Science & Technology》 CAS 2016年第10期2312-2314,共3页
[Objective] The study was to determine the optimal quantity of fertilizer required for Yongbao 2 during heading. [Method] According to a randomized block design with three replicates, four fertilizer treatments and on... [Objective] The study was to determine the optimal quantity of fertilizer required for Yongbao 2 during heading. [Method] According to a randomized block design with three replicates, four fertilizer treatments and one blank control were set in field trials. Each plot had a net area of 66.7 m2, Finally, the mustard yield and economic benefit per plot among the treatments were compared. [Result] There was no significant difference in yield among the four fertilizer treatments. The agronomic traits and yield of Yongbao 2 were improved when the quantity of fertilizer was gradually increased. The treatment with 750 kg/hm2 compound fertilizer during mus- tard heading had the highest yield. However, the treatment with 450 kg/hm2 of compound fertilizer during mustard heading had the highest economic benefit. By considering both yield and benefit, 450 kg/hm2 was the optimal quantity of fertilizer required for Yongbao 2 during heading. [Conclusion] The results will provide references for future application and extension of Yongbao 2. 展开更多
关键词 Late-maturing heading mustard Yongbao 2 optimal quantity of fertilizer
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Production Benefits of Double-Cropping Rice Under Optimized Application of Nitrogen and Potassium Fertilizers Combined with Chinese Milk Vetch and Straw Co-Returning to Fields 被引量:3
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作者 DONG Chun-hua MA Chao-hong +4 位作者 HU Ke-xin HE Yun-long LI Wan-min CHU Fei YANG Zeng-ping 《Agricultural Science & Technology》 CAS 2021年第1期17-25,共9页
In order to explore the technology and effects of reducing nitrogen and potassium fertilizer applications in double-cropping rice,a field plot experiment was conducted to study the effects of optimized application of ... In order to explore the technology and effects of reducing nitrogen and potassium fertilizer applications in double-cropping rice,a field plot experiment was conducted to study the effects of optimized application of nitrogen and potassium fertilizers combined with returning Chinese milk vetch and straw to fields on yield,fertilizer utilization efficiency,net photosynthetic rate(Pn),stomatal conductance(Gs),intercellular CO_(2) concentration(Ci),chlorophyll content(SPAD value)and soil physical and chemical properties in late rice harvest period.The results showed that the optimized application of nitrogen and potassium fertilizers combined with the integrated technology of Chinese milk vetch and straw co-returning to the field could enhance the photosynthetic efficiency of double-cropping rice,increase rice yield,and enhance soil biological activity,especially T4 treatment involving the returning of Chinese milk vetch and straw to the field instead of 30%nitrogen fertilizer achieved the highest rice yield,fertilizer use efficiency,net photosynthetic rate and soil biological activity.Compared with the conventional fertilization treatment T2,the total rice yield of T4 treatment increased by 4.1%,among which the early rice and late rice increased by 6.3%and 2.4%,respectively;Pn,Gs and SPAD values of flag leaves at full heading stage significantly increased,and the contents of soil active organic carbon,alkali hydrolyzed nitrogen,available phosphorus and readily available potassium significantly increased. 展开更多
关键词 Double-cropping rice Optimized application of nitrogen and potassium fertilizers Chinese milk vetch and straw co-returning to fields Rice yield Soil physical and chemical properties
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Optimization of fertilizer performances in long-term garlic cropping soils 被引量:1
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作者 Tianqi WEI Hongmei ZHOU +3 位作者 Huayang HONG Yanyun REN Qin LIU Yanhua SU 《Pedosphere》 SCIE CAS CSCD 2024年第3期577-589,共13页
Continuous cropping is a common pattern of modern agriculture that takes regional advantages for crop yield profits.Along the progress of mono-cropping continuously supported by intensive fertilizer inputs,such a crop... Continuous cropping is a common pattern of modern agriculture that takes regional advantages for crop yield profits.Along the progress of mono-cropping continuously supported by intensive fertilizer inputs,such a cropping pattern often undergoes serious problems with low fertilizer use efficiencies and unsustainable crop production.In this study,we dealt with a>25-year continuous garlic cropping system as an example for a problem-solving investigation.These garlic cropping soils underwent problems characterized by loss of soil organic matter,dramatic retention of NH_(4)^(+)-N,and excess accumulation of phosphate and potash chemicals.Through hydroponic simulations,we revealed that the presence of NH_(4)^(+)-N inhibited the root uptake of NO_(3)^(-)-N and K by 68% and 88%,respectively.Despite the traditionally emphasized importance of K,we observed the negative effect of high K on the growth of garlic roots.Further field experiments demonstrated that P and K applications can be reduced by 60% and 50%,respectively,without loss of yield.We thus developed a high-performance fertilization strategy by integrating a recomposed NPK fertilizer formulation to reduce unnecessary P and K inputs,a supplementary application of long-lasting C of woody peat to compensate for the soil C loss,and a foliar K approach to strengthen the stomatal function improvement with K.This strategy allowed a 15% increase of garlic yield and a seasonal soil C profit of ca.1.8 Mg ha^(-1)even at ca.30% lower fertilizer cost.This study would be helpful in managing garlic fertilization and developing compound fertilizers,with broader significance for other long-term cropping soils. 展开更多
关键词 fertilization strategy fertilizer input field validation hydroponic simulation optimized fertilization soil nutrient balance yield profit
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Assessing non-point source pollution in an apple-dominant basin and associated best fertilizer management based on SWAT modeling
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作者 Yiwen Han Zhong Liu +4 位作者 Yafei Chen Yingxuan Li Haipeng Liu Lianghong Song Yong Chen 《International Soil and Water Conservation Research》 SCIE CSCD 2023年第2期353-364,共12页
Investigating the impact of apple-dominated areas on nitrogen(N)and phosphorus(P)losses at a basin scale was essential for the sustainable development of apple industry in China.This study conducted a survey on fertil... Investigating the impact of apple-dominated areas on nitrogen(N)and phosphorus(P)losses at a basin scale was essential for the sustainable development of apple industry in China.This study conducted a survey on fertilizer application and built a Soil and Water Assessment Tool(SWAT)model to quantita-tively analyze the N and P losses in the Qixia apple-dominated area.Additionally,the decreases in N and P losses through adjusting the fertilizer application modes were evaluated.Results showed that average N and P losses in the Wulong River Basin(WRB)were 44.4 and 0.365 kg ha^(-1)in 2011-2017,respectively,and apple orchards accounted for 733%and 51.4%of the total N and P losses in the basin.Under nine fertilizer scheduling scenarios,three fertilizer schedule scenarios,automatic fertilizer application(S-AUTO),"one shot"mode(S1),and regulated fertilizer application(S-BSD),had the lowest N and P losses in apple orchards.The decreases in N loss ranged from 20.6%to 26.1%at the subbasin scale and 14.8%-30.7%at the basin outlet when applying the S-AUTO,S1,and S-BSD fertilizer application modes in Qixia apple orchards and all apple orchards in the WRB.The reductions in P loss varied from 22.0%to 46.1%at the subbasin scale and 14.6%-25.6%at the basin outlet.In orchard-dominated basin,N and P losses can be effectively reduced by optimizing the orchard fertilizer scheduling strategies. 展开更多
关键词 Apple orchards Questionnaire survey N and P losses Optimized fertilizer management Basin management
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