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地膜覆盖栽培是大幅度提高农作物产量的一项重要措施,但油菜地膜覆盖栽培试验极少。为此,我们1984～1986年连续3年对油菜地膜覆盖栽培进行了研究。本文在肯定地膜覆盖栽培增产效果(见《湖北农业科学》1985年第7期)的基础上着重总结分析油菜覆膜栽培的地温效应及土壤养分动态。 一、覆膜栽培的地温效应 1.生育期的地温比较及其产量效应 1984年在水田进行,油菜生育期(11月至次年5月上旬,下同)的地积温,移栽覆膜(9月18日育苗,10月25日移栽,下同)为2028.0℃,比不覆膜高78.3℃,地日温平均高0.41℃;直播覆膜(10
Film mulching cultivation is an important measure to greatly increase crop yield, but rape mulching is rarely done. To this end, we 1984-1986 three consecutive years of rape mulching cultivation were studied. This paper affirmed the yield-increasing effect of plastic film mulching cultivation (see Hubei Agricultural Sciences, Issue 7, 1985), and summarized the geothermal effect and soil nutrient dynamics of rape covered cultivation. First, the temperature effect of film cultivation 1. Comparison of the geothermal temperature during the growth period and its yield effect In paddy field in 1984, rape growth period (November to early May, the same below) the plot temperature, transplanting film September 18 seedling, October 25 transplanting, the same below) was 2028.0 ℃, 78.3 ℃ higher than the non-coverage, average daily high temperature 0.41 ℃; direct seeding (10