适雨灌溉下不同施肥模式对机插稻稻田水环境及水稻产量的影响

晏军; 朱建强

Cite this article:	晏军,朱建强.适雨灌溉下不同施肥模式对机插稻稻田水环境及水稻产量的影响[J].灌溉排水学报,0,():-.
	yanjun,zhujianqiang.适雨灌溉下不同施肥模式对机插稻稻田水环境及水稻产量的影响[J].灌溉排水学报,0,():-.

【Print this page】【Download the full text in PDF】【查看/发表评论】【EndNote】【RefMan】【BibTex】

Archive Advanced Search

This article has been：Browse 2437Times Download 0Times
Font:+\|=\|-
DOI：

Effects of Different Fertilization Models on Paddy Water Environment and Yield in Machine-transplanted Rice under irrigation adjusted by rainfall
yanjun¹, zhujianqiang²
1.Xinyang Experimental Station of Jiangsu Institute of Agricultural Sciences in Coastal Areas;2.Yangtze University
Abstract:
【Objectives】Machine-transplanting rice has the characteristics of small seedling age, long seedling stage and heavy plant injury, etc., in order to explore the effects of different fertilization modes on paddy water environment of machine-transplanting rice and rice growth under rainfall adaption irrigation , which can provide theoretical and data support for the improvement of water and fertilizer management measures of machine-transplanting rice in Jianghan Plain.【Methods】The field plot experiment were carried out to study the effects of farmers' fertilization practice (FFP), 70% controlled release compound fertilizer+30% urea,(70%CRF+30%N), Organic-inorganic mixed fertilizer(OIF)on rainfall utilization rate, dynamic changes of nitrogen and phosphorus concentration in surface water, runoff loss, dry matter accumulation and rice yield under rainfall adaption irrigation.【Results】i) Rainfall utilization efficiency at green-turning stage, tillering stage, jointing booting stage and filling maturity stage were 17.5%, 100%, 100% and 84.2% respectively under rainfall adaption irrigation. ii) After application of base fertilizer and tillering fertilizer, the concentrations of TN, NH4 +N and TP increased rapidly in surface water of FFP, 70% CRF+30% N and OIF treatments, reaching the peak value on the first day, the average concentrations of TN, NH4 +N and TP in surface water with 70% CRF + 30% N decreased by 40.4%, 47.4% and 0.5% respectively within 30 days after rice transplantation compared with FFP treatment; iii) About 90% of nitrogen and phosphorus runoff loss in paddy field was in the re-greening stage, about 10% was in from grouting to ripe period, and the runoff loss of TN, NH4 +N and TP was 31.4%, 30.9% and 1.9% lower in 70% CRF+30% N than in FFP; iiii) The dry matter accumulation of 70% CRF + 30% N treatment was significantly lower than in FFP and OIF treatment at the, the proportion of dry matter accumulation in total accumulation was FFP > OIF > 70% CRF + 30% N at from the transplant stage to re-greening stage, the dry matter accumulation of OIF treatment at the mature stage was significantly higher than in 70% CRF + 30% N and FFP treatment, the actual yield was OIF > 70% CRF + 30% N > FFP.【Conclusions】Under the condition of rainfall adaption irrigation, 70% CRF+30% N was helpful to decrease nitrogen runoff loss in paddy, OIF was contributive to increase dry matter accumulation and yield of machine-transplanting rice。
Key words: machine-transplanting rice; rainfall adaption irrigation; fertilization mode; nitrogen and phosphorus loss; dry matter accumulation; yield;