摘要
在我区本文首次应用叶分析和土壤营养诊断技术指导果园施肥研究。引黄灌区主要苹果园近三分之一N素处于低值水平,二分之一左右的树体P和K素低值或缺乏。土壤有机质,N和P严重不足,K素丰富。建议采取秸杆还田,杂草覆盖以及种植绿肥等措施,尽快提高土壤有机质含量;果园施基肥应在8月中旬至9月中旬。改一年一施为三年一施。
This paper studies the application of leaf analysis and soil nutrient diagnosis to having adequate fertilization in orchards. It has been found that N in about one third of apple trees in the irrigation area of Ningxia is at low level while P and K in about half of the trees are at low level or in deficiency. K is rich in the soil while N and P are deficient. The paper recommends some measures such as straw returning, grass covering and planting green manure crops in order to increase organic elements in the soil. It also suggests that the application of base manure in orchards should be done from mid August to mid September, and that the fertilizer should be applied every three years instead of every year.
出处
《农业科学研究》
1991年第2期24-30,共7页
Journal of Agricultural Sciences
关键词
苹果园
施肥
叶分析
土壤营养诊断
orchard fertilization analysis of leaves nutrient diagnosis in soil
