摘要
采用氮磷钾 3因素 5水平二次回归正交组合设计方法 ,对潴育型紫色水稻土、中性紫色土、酸性紫色土栽培烤烟的研究表明 ,3种土壤速效氮磷钾含量与预报产量及产值间呈较好的直线型正相关关系。土壤速效磷、钾含量与预报产量磷、钾施用量呈较好的负相关关系 ,土壤速效钾含量与预报产值施钾量呈正相关关系。磷钾施用量与最佳产量呈负相关关系 ,钾施用量与最高产值呈较好的正相关关系。 3种土壤氮磷钾养分模型预报的最佳产量、最高产值及产投比均以潴育型紫色水稻土 >中性紫色土 >
An orthogonal quadratic regression design with 3 factors (NPK) at 5 levels was adopted in field experiments on a water-logged purple paddy soil,a neutral purple soil and an acid purple soil.The readily available NPK in the three soils appeared in positive linear correlation with the predicted yield and output value. The amount of P and K fertilizers needed for the achievement of the predicted yield was in negative correlation with the readily available P and K in the soils.Readily available K showed a positive correlation with the amount of K needed for the realization of the predicted output value.P and K rate was in negative correlation with the optimum yield.K rate was in positive correlation with maximum output value.The optimum yield,maximum output value and input:output ratio predicted by the three fertilization models all appeared in the sequence:water-logged purple paddy soil>neutral purple soil>acid purple soil.
出处
《西南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第1期47-50,共4页
Journal of Southwest Agricultural University
基金
云南省科委重点基金
云南省烟草公司科技项目资助
