黄土丘陵区梨枣树氮、磷、钾施肥效应与施肥模式  

Effects and Models of N, P, K Fertilization for Ziziphus jujuba cv. Lizao Trees in Loess Hilly Region

作　　者：刘璇[1] 王渭玲[1] 徐福利[1,2] 刘倩雯[1] 

机构地区：[1]西北农林科技大学生命科学学院,杨凌712100 [2]西北农林科技大学中国科学院水利部水土保持研究所,杨凌712100

出　　处：《林业科学》2013年第2期21-26,共6页Scientia Silvae Sinicae

基　　金："十二五"国家科技支撑计划(2011BAD29B04);陕西省科技创新工程(2011KTCL02-02)

摘　　要：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。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.

关 键 词：梨枣 产量 品质 最优施肥模式 

分 类 号：S759.39[农业科学—森林经理学]