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The Overall Effects of Stubble Mulching Farmlads andIts Technical Series

Du Shouyu Tian Enping Wen Min Wu Qingshan(General Extensiontation of Agricultural Techniques ofNingxia )(Agrotechnical Extension Center of Guyuan County)  
In the years of 1989~1992, the split plot design supplemented with the fixed position tests for the yearly subtests was adopted to study the effects of stubblemulching farmlands and its technical series in the cultivated lands with Heilu soil in themountain area in south part of Ningxia. The results indicate that the stubble mulchinghas such good effects as water storage and moisture conservation ,adjustment of landtemperatures ,soil and water conservation ,weed inhibitation and control ,soil structureimprovement,raising organic matter contents and minerial nutrient levels in soil andstrengthening soil bioactivities. And when 4500kg/hm2 of stubbles matchedwith theapplication of 1.1%of N fertilizer were used to mulch farmlands,total grain and oilyields were increased by 29.84%in four years. Mulching patterns,tnulching duration,amount of stubbles mulched farmlands and the matching application of N and P fertilizers have formed the main body of stubble mulching techniques.
【CateGory Index】: S141.4
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