Effects and Models of N, P, K Fertilization for Ziziphus jujuba cv. Lizao Trees in Loess Hilly Region | 黄土丘陵区梨枣树氮、磷、钾施肥效应与施肥模式
2013
Liu Xuan, Northwest Agriculture and Forestry University, Yangling (China),College of Life Sciences | Wang Weiling, Northwest Agriculture and Forestry University, Yangling (China),College of Life Sciences | Xu Fuli, Northwest Agriculture and Forestry University, Yangling (China),College of Life Sciences
chinois. 采用3因素2次D-饱和最优设计,通过大田试验建立氮、磷、钾施肥量与梨枣产量和品质综合评分的效应函数。结果表明,氮、磷、钾肥对梨枣产量的作用顺序为：钾肥〉磷肥〉氮肥;氮、磷、钾肥对梨枣品质的作用顺序为：钾肥〉氮肥〉磷肥。采用频率分析法对各效应函数进行寻优结果表明：梨枣目标产量在23000～27000kg・hm-2,95%置信区间的优化施肥量为N2 72～499kg・hm-2、P2O5 204～297kg・hm-2、K2O 243～323kg・hm-2;梨枣品质综合评分在85分以上,95%置信区间的优化施肥量为N 407～737kg・hm-2、P2O5 158～306kg・hm-2、K2O 285～376kg・hm-2;梨枣高产优质的最优施肥量为N 407～499kg・hm-2、P2O5 204～297kg・hm-2、K2O 285～323kg・hm-2。
Afficher plus [+] Moins [-]anglais. A field experiment with three factors D-saturated optimal design was carried out to investigate the effect of nitrogen, phosphorus and potassium fertilizer on yield and quality of pear-jujube （Ziziphus jujuba cv. Lizao）trees in loess hilly region. The results showed that： fertilizer efficiency of N, P, K on the pear-jujube yield was： K P N; but on the improved quality was： KNP. The frequency analysis showed that if the expected pear-jujube yield is 23 000-27 000 kg・hm-2, the optimal fertilizer rate is needed to be 272-499 kg・hm-2 of N, 204-297 kg・hm-2 of P2O5, and 243-323 kg・hm-2 of K2O; if the expected quality average value is 85, the optimal fertilizer rate is 407-737 kg・hm-2 of N, 158-306 kg・hm-2 of P2O5, and 285-376 kg・hm-2 of K2O. Consequently, the optimal fertilizer application rates for both high yield and high quality are 407-499 kg・hm-2 of N, 204-297 kg・hm-2 of P2O5, and 286-323 kg・hm-2 K2O.
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