摘要
采用田间土柱栽培的方法,研究了不同土壤肥力条件下施氮量对小麦根系氮素吸收、同化及子粒产量和蛋白质含量的影响。结果表明,小麦浅层根系衰老开始的时间比深层根系早,深层根系对小麦生育后期氮素吸收具有重要的作用。增施氮肥或土壤肥力高有利于小麦根系的生长发育,提高了根系活力和氮素同化关键酶的活性,延缓了根系的衰老,提高了小麦子粒产量和蛋白质含量。
Soil column culture was used to investigate the effect of nitrogen rate on root nitrogen absorption, assimilation, grain yield, and protein content in different fertility soils The results showed that the upper roots senesced earlier than that deeper roots, which played an important role in nitrogen absorption during later development stage Increased nitrogen rate and high soil fertility promoted root growth and root activity, increased the activity of key enzymes in nitrogen assimilation As a result, high nitrogen rate and soil fertility delayed root senescence and increased grain yield and protein contentKey words: winter wheat; root; nitrogen assimilation; grain yield; protein content
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2003年第1期39-44,共6页
Journal of Plant Nutrition and Fertilizers
基金
国家自然科学基金项目(39970425)资助。
