In order to increase mulberry leaf yield and production efficiency in hilly areas of Sichuan Province through scientific fertilization,＂3414＂,a quadratic regression design for modern fertilization,was employed to si...In order to increase mulberry leaf yield and production efficiency in hilly areas of Sichuan Province through scientific fertilization,＂3414＂,a quadratic regression design for modern fertilization,was employed to simulate the regression relationship between mulberry leaf yield and major fertilizer elements including nitrogen（N）,phosphor（P） and potassium（K） among which mulberry leaf yield was the objective function and N,P and K were the regulatory factors to fertilization level.As a result,7 types of ternary,binary and monadic quadratic fertilizer effect functions of N,P and K fertilizer elements were established.The weight of fertilizer factors in the optimal mulberry leaf yield obtained by various types of functions was in decreasing order of KPKPNPKNKNNP,and the weight of fertilizer factors in the ratio of leaf yield to input was in decreasing order of K〉PK〉NPK〉P〉NK〉NP〉N.To be specific,the ternary quadratic fertilizer effect function（Y=20 313＋0.25X1＋43.48 X2＋34.47X3-0.01X1^2-0.14X2^2-0.06X3^2＋0.05X1X2＋0.02X1X3-0.07X2X3,in which X1,X2 and X3 indicate the fertilizer factors N,P and K,respectively） was a model containing all factors,thereby being a recommended fertilization program for mulberry field.Single factor effect analysis indicated that K fertilizer had the highest influence on mulberry leaf yield and ratio of leaf yield to input.Therefore,among all the simulation functions,the monadic quadratic fertilizer effect function of K fertilizer factor（Y=25 002.27＋44.728X3-0.084X32） leads to the optimal leaf yield and maximum ratio of leaf yield to input.By using the optimal fertilization program with 600 kg/hm2 N,210 kg/hm2 P2O5 and 254.33 kg/hm2 K2O,the optimal economic leaf yield obtained is 30 945.00 kg/hm2,the cost of fertilizer input is 4 403.65 yuan/hm2,and the ratio of leaf yield to input is as high as 17.57.After verification by production practices,the recommended fertilization indicators in the optimal mulberry fertilization program can provide reference for the construction of high-yield mulberry field in hilly areas of Sichuan Province.展开更多
采用田间试验方法,研究了平衡施肥对川中丘陵干旱区高淀粉甘薯徐薯22和川薯34产量和品质的影响。结果表明,与不施肥处理相比,氮磷钾肥配合施用使徐薯22增产40.2%～56.0%,淀粉含量增加1.5～3.3个百分点;川薯34增产38.7%～52.7%,淀粉含量...采用田间试验方法,研究了平衡施肥对川中丘陵干旱区高淀粉甘薯徐薯22和川薯34产量和品质的影响。结果表明,与不施肥处理相比,氮磷钾肥配合施用使徐薯22增产40.2%～56.0%,淀粉含量增加1.5～3.3个百分点;川薯34增产38.7%～52.7%,淀粉含量增加0.2～6.7个百分点。在高产目标下,徐薯22每生产100 kg块茎(干重),需要0.64～0.87 kg N、0.09～0.11 kg P2O5和0.88～1.39 kg K2O;川薯34每生产100 kg块茎(干重),需要0.71～0.88 kg N、0.07～0.13 kg P2O5和0.70～1.14 kg K2O。与氮磷钾肥料都作底肥施用相比,分次施肥显著提高高淀粉甘薯的淀粉含量,徐薯22提高量为4.1个百分点,川薯34为6.9个百分点。综合产量和品质因素,45kg/hm2N、45 kg/hm2P2O5和90 kg/hm2K2O为试验条件的最佳施肥量。展开更多
基金Supported by Excellent Paper Fund from Sichuan Academy of Agricultural Sciences(No.2011LWJJ-008)Breeding Genetic Engineering Project from Sichuan Provincial Department of Finance of the 12th Five-Year Plan(2011JYGC10-027-02)Special Fund for Construction of Modern Agricultural Industry Technology System(Sericulture)~~
文摘In order to increase mulberry leaf yield and production efficiency in hilly areas of Sichuan Province through scientific fertilization,＂3414＂,a quadratic regression design for modern fertilization,was employed to simulate the regression relationship between mulberry leaf yield and major fertilizer elements including nitrogen（N）,phosphor（P） and potassium（K） among which mulberry leaf yield was the objective function and N,P and K were the regulatory factors to fertilization level.As a result,7 types of ternary,binary and monadic quadratic fertilizer effect functions of N,P and K fertilizer elements were established.The weight of fertilizer factors in the optimal mulberry leaf yield obtained by various types of functions was in decreasing order of KPKPNPKNKNNP,and the weight of fertilizer factors in the ratio of leaf yield to input was in decreasing order of K〉PK〉NPK〉P〉NK〉NP〉N.To be specific,the ternary quadratic fertilizer effect function（Y=20 313＋0.25X1＋43.48 X2＋34.47X3-0.01X1^2-0.14X2^2-0.06X3^2＋0.05X1X2＋0.02X1X3-0.07X2X3,in which X1,X2 and X3 indicate the fertilizer factors N,P and K,respectively） was a model containing all factors,thereby being a recommended fertilization program for mulberry field.Single factor effect analysis indicated that K fertilizer had the highest influence on mulberry leaf yield and ratio of leaf yield to input.Therefore,among all the simulation functions,the monadic quadratic fertilizer effect function of K fertilizer factor（Y=25 002.27＋44.728X3-0.084X32） leads to the optimal leaf yield and maximum ratio of leaf yield to input.By using the optimal fertilization program with 600 kg/hm2 N,210 kg/hm2 P2O5 and 254.33 kg/hm2 K2O,the optimal economic leaf yield obtained is 30 945.00 kg/hm2,the cost of fertilizer input is 4 403.65 yuan/hm2,and the ratio of leaf yield to input is as high as 17.57.After verification by production practices,the recommended fertilization indicators in the optimal mulberry fertilization program can provide reference for the construction of high-yield mulberry field in hilly areas of Sichuan Province.
文摘采用田间试验方法,研究了平衡施肥对川中丘陵干旱区高淀粉甘薯徐薯22和川薯34产量和品质的影响。结果表明,与不施肥处理相比,氮磷钾肥配合施用使徐薯22增产40.2%～56.0%,淀粉含量增加1.5～3.3个百分点;川薯34增产38.7%～52.7%,淀粉含量增加0.2～6.7个百分点。在高产目标下,徐薯22每生产100 kg块茎(干重),需要0.64～0.87 kg N、0.09～0.11 kg P2O5和0.88～1.39 kg K2O;川薯34每生产100 kg块茎(干重),需要0.71～0.88 kg N、0.07～0.13 kg P2O5和0.70～1.14 kg K2O。与氮磷钾肥料都作底肥施用相比,分次施肥显著提高高淀粉甘薯的淀粉含量,徐薯22提高量为4.1个百分点,川薯34为6.9个百分点。综合产量和品质因素,45kg/hm2N、45 kg/hm2P2O5和90 kg/hm2K2O为试验条件的最佳施肥量。
