摘要
采用回归最优设计研究了肥料对小麦—玉米—甘薯栽培模式的效应。得到了三套高产优化回归方程和7种高产栽培方案,可增产粮食132.4％～142.5％,产投比为4.1∶1。小麦高产的合理剑叶面积为32～36cm^2/株。玉米产量在施有机肥的基础上,随密度增加而增加。甘薯施用钾肥能明显提高薯块干物质和淀粉含量。
The 416B regression design was adopted to study the effects of various fertilizer combinations and plant density on the yield of the crop in a rotation system of wheat-maize-sweet potato. Three optimized regression, equations were established whereby seven culture methods for obtaining high yields were developed. A yield increase in the range of 132.4 to 142.5 per cent was achieved with an output: input ratio of 4.1 : 1. The desirable flag leaf area was estimated about 32～36 cm^2/plant for realizing high yield of wheat. Given organic manure application, maize yield increased with plant density. K dressing markedly enhanced dry matter and starch in the tuber or sweet potato.
出处
《西南农业大学学报（自然科学版）》
CSCD
1993年第6期541-545,共5页
Journal of Southwest Agricultural University
关键词
小麦
玉米
甘薯
高产
坡改梯
regression experimental designs
fertilizing
triticum aestivum
maize
sweet potatoes
