There was no significant difference of rice grain yields between the treatments of straw mulching and plastic film covering but the cost and soil pollution in the latter should be concerned.
覆膜处理虽在产量和水分利用效率上略高于盖草处理，但差异不显著，且覆膜处理存在成本高，污染土壤等缺陷。
Underground water quality in rice field under plastic film mulching cultivation was monitored during rice growth period.
对水稻覆膜旱作条件下稻田地下水水质变化作了动态检测。
Effects of plastic film mulching and pre-sowing irrigation on yield formation of spring wheat.
地膜覆盖和底墒灌溉对春小麦产量形成的影响。
This paper deliberated on the status of pollution brought by chemical fertilizer, pesticides and mulching plastic film, and according to each problem the corresponding treatments were put forward.
分析和探讨了化肥、农药及地膜对我国农田环境的污染状况，提出了控制农业自身污染的对策。
The results were as follows:Compared with conventional flooded paddy soils, rain fed and mulching plastic film slightly reduced bulk density, increased total porosity of the soils.
与常规水作相比，覆膜旱作稻田土壤容重有所下降，总孔隙度增加显著；
The results showed that the plastic film mulching could improve the soil moisture and heat condition in the rhizosphere of rape.
结果表明：地膜覆盖能显著改善油菜根际的水、热状况。
The effect of temperature-increasing and insulation of water-permeability plastic film mulching was superior to the common plastic film mulching's in sorghum growing prior season.
渗水地膜覆盖加速了有效养分的转化，其生长发育吸收的土壤营养大于普通地膜覆盖和露地。
Experiments of plastic film mulching and time of removing were carried out in Liangshan Tobacco Research Institute.
在四川省凉山州烟草科学研究所进行了地膜覆盖与揭膜时期试验。
Compared normal plastic film and straw mulching, winter wheat yield with water-osmosis plastic film mulching increased by 43.1% and 40.4%.
与常规地膜覆盖和秸秆覆盖比较，渗水地膜覆盖冬小麦增产分别为43.1%和40.4%。
The results show that, under the dual mulching mode of plastic film and straw, the grain yield increase by 12.
结果表明，地膜和秸秆双元覆盖模式下小麦籽粒产量比对照增产12。
The field trial of plastic film mulching on dryland spring wheat was conducted in the semiarid region of Loess Plateau.
在黄土高原半干旱地区，对旱地春小麦进行短期地膜覆盖试验。
Suitable for large, medium, plastic film mulching and rob early work. the cultivation.
适宜大、中、小棚及地膜覆盖抢早栽培。
Results indicated that the best control effect and yield increase were obtained from the cultivation of early sowing with plastic film mulching.
结果表明，早播覆膜防病增产效果最好，防效达827％，产量成倍增加。
Results indicated that the best control effect and yield increase were obtained from the cultivation of early sowing with plastic film mulching.
结果表明，早播覆膜防病增产效果最好，防效达827％，产量成倍增加。
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