摘要
在黄土区坡耕地土壤较瘠薄条件下，提高肥力水平可促进谷子根系生长，使根系加粗，根数和根量增加，扩大对土壤深层水分的利用，改变植株的水分状况，明显降低谷子冠气温差ΔＴ，使生物产量和籽粒产量增加，群体生产力水平提高。改善土壤养分状况是提高坡地谷子生产力水平的重要途径。
Field experimental research was conducted on slope land of Loess Plateau, in order to study the effects of nutrient level spplied on root growth and productivity of millet (Staria) on slope land. The research results indicated that raising soil nutrient level could promote root growth, root diametre, root number and root weight, as well as expand water usage in deep layer, improve moisture state in soil and plant, reduce canopy air temperature of millet obviously, increase biological mass and grain yield, and enhance millet productivity. To raise soil nutrient level is a very important way for slope land millet productivity.
出处
《干旱地区农业研究》
CSCD
北大核心
1998年第2期53-57,共5页
Agricultural Research in the Arid Areas
基金
黄土高原土壤侵蚀与旱地农业国家重点实验室基金
中国科学院"百人计划"项目
关键词
施肥
根系生长
生产力
坡耕地
谷子
nutrient level, root growth, productivity, slope land, millet
