摘要
采用氮、磷、钾3因素2次D-饱和最优设计(310),通过大田试验建立了氮、磷、钾施肥量与桔梗产量和总皂苷含量的效应函数。结果表明,氮、磷、钾肥对桔梗产量的影响大小依次为氮肥>钾肥>磷肥;氮、磷、钾肥对桔梗总皂苷含量的影响大小依次为氮肥>磷肥>钾肥。对各效应函数进行频率分析法寻优结果表明,桔梗目标产量在4200～4800 kg/hm2,95%置信区间的优化施肥量为N 83.72～119.41 kg/hm2、P2O564.10～134.39 kg/hm2、K2O 78.80～147.20 kg/hm2;桔梗总皂苷含量在5.5%以上,95%置信区间的优化施肥量为N 113.37～140.12kg/hm2、P2O585.96～153.44 kg/hm2、K2O 76.86～136.38 kg/hm2;桔梗高产优质高效栽培最优施肥量为N 113.37～119.41 kg/hm2、P2O585.96～134.39 kg/hm2、K2O 78.80～136.38 kg/hm2,N、P2O5、K2O的最优施用量配比为1∶0.72～1.18∶0.66～1.20。
The effect functions of nitrogen, phosphorus and potassium application codes on the yield and total sapo- nin of Platycoclon grandiflorum were established by conducting field experiments using three-factor D-saturation op- timal design （310）. The results show that the effects of nitrogen, phosphorus and potassium on yield and total sap- onin are nitrogen 〉 potassium 〉 phosphorus and nitrogen 〉 phosphorus 〉 potassium respectively. The results of the frequency analysis show that for the target yield between 4200 and 4800 kg/ha and confidence interval 95% , the optimal fertilizer application rates of N, P2O5 and K2O, are 83.72 -119.41, 64. 10 -134. 39 and 78.80 - 147.20 kg/ha respectively, and for the total saponin content over 5.5%, the optimal fertilizer application rates are 113.37 -140. 12, 85.96 -153.44 and 76. 86 -136. 38 kg/ha, respectively. Consequently, the optimal fertilizer application rates for both high yield and high quality of Platycodon grandiflorum are 113.37 -119.41, 85.96 - 134. 39 and 78.80-136. 38 kg/ha, respectively. The corresponding fertilizer ratio of N ： P2O5：K2O is 1：0. 72 - 1.18 ： 0. 66 -1.20.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2012年第1期196-202,共7页
Journal of Plant Nutrition and Fertilizers
基金
“十一五”国家支撑计划项目(2007BAD79B06)
陕西省2011年科学技术研究发展计划中药材规范化种植基地建设项目(2011K16-01-05)资助
关键词
桔梗
产量
总皂苷含量
效应函数
最优施肥模式
Platycodon grandiflorum
yield
total saponin
effect function
optimal fertilization model
