【摘要】 通过2年田间定位试验,研究了采用"田"字型明沟排水措施对冷浸田土壤理化性质及产量的影响。结果表明,与不开排水沟的对照处理相比,明沟排水处理土壤密度降低11.0%,总孔隙度和通气孔隙度分别增加6.0%和19.0%,移栽后10d和37d土壤温度增加1.3℃和1.9℃;2011年晚造和2012年早造易氧化有机质增加11.0%和15.0%,有效穗数提高7.6%和4.3%,结实率提高2.2%和1.2%,产量提高1 494和1 225.5kg/hm2。更多还原

【Abstract】 Stationary experiments for two years were conducted to study the effects of open ditch drainage on soil physical and chemical properties and rice yield in cold spring paddy field.The results showed that compared with CK,soil bulk density decreased by 11.0%,the total porosity and aeration porosity of soil increased by 6.0% and 19.0% and soil temperatures of 10dand 37dafter transplanting increased by 1.3℃and 1.9℃ under open ditch drainage;The active organic matters increased by 11.0%and 15.0%, effective panicles numbers and seed setting rate increased by 7.6%and 4.3%,2.2%and 1.2%,and yield increased by 1494kg/hm2 and 1225.5kg/hm2 at late rice in 2011and early rice in 2012under open ditch drainage compared to CK,respectively.更多还原