摘要
本文根据两年田间试验，探讨了冷浸田水稻在湿润栽培情况下土壤氧化还原电位、还原性物质总量、有机质和速效氮的动态变化规律，以及两个水稻品种在不同栽培情况下的吸氮状况．试验结果表明：冷浸田湿润栽培的增产原因在于改善土壤环境，土温升高，土壤昼夜温差加大，氧化还原电位提高，还原性物质总量减少，使土壤中潜在养分释放，特别是氮素释放最多，为稻根的营养吸收创造有利条件；稻根健壮，根系活力增强，地上部光合器官发达．
On the basis of the results of field experiments and investgations in the exem-plary field in recent two years,this paper inquires into the regular patterns of the trendin the variations of soil redox potential,total amount of reducing substance,organicmatter and available nitrogen and the status of nitrogen-uptake of two rice varieties un-der the conditions of distinct cultivation,The results make it clear that cause of in-creasing yield of the rice damp cultivation in cold spring paddy fields lies in the im-provement of soil environment,the raise of soil redox potential,the decrease of totalamount of reducing substance,and the release of soil potential nutrient,especially ni-trogen, thus to create favourable conditions for the root nutrient-uptake. Damp culti-vation makes the root healthy and strong,enhances the vigor of root system,and flour-ish the photosynthetic apparatus.
出处
《云南农业大学学报》
CAS
CSCD
1994年第2期105-111,共7页
Journal of Yunnan Agricultural University
关键词
水稻
冷浸田
湿润栽培
速效氮
Riee
Cold spring paddy field,damp cultivation
available nitrogen
redox potential
