摘要
从１９９０～１９９２年，在山西省６个试验点，研究了不同耕作方式和覆盖方式之间的相互关系，筛选出了耕作方式与覆盖方式的最佳组合，即免耕整秸秆半覆盖。在此基础上，进行了与其配套的除草剂、肥料、播期、播种方式及病虫害防治对策等一系列试验，建立起了一套完整的免耕整秸秆半覆盖技术体系。与常规耕作相比，采用本技术，在正常降水年份，玉米可增产２６．０％，严重春旱年份增产２２．０％，春夏连旱年份增产１６．５％，夏秋连旱年份增产７１．７％，伏旱年份增产２１．７％。免耕覆盖田每平方米有３３．５条蚯蚓，常规耕作田仅有２．５条，３年免耕覆盖田０～２０ｃｍ土壤有机质增加０．１３个百分点，速效钾增加每百克土１０μ／ｋｇ。
interrelations between tillage and stalk mulching were studied from the years of 1990 to1992 in six locations of Shanxi Province.The optimum combination-i.e.no-till and semi-mulching by whole stalks was selected in the basis of which a series of experiments including herbcides,fertilizers,planting time,planting types and con-trolling pests were conducted to form a complete set of technical package of no-till and sem-mulching by whole stalks.As compared with the convential tillage in applying thistechnical package,corn yield increased by 26%under normal rainfall;by 22%in the case of spring drought;by 16.5%under spring drought through summer;by 71.7% when drought in summer and fall;by 21.9%under summer drought.Worms in no-till plot were 33.5/m2 while those in the conventional tillage plot were 2.5/m2;and soil organic matter and available potassium at 0～20 cm in depth were 2.31%and 24.08 mg/100g soil,and those in the conventional tillage plot were 2.18%and 13.6mg /1009g soil respectively.
出处
《干旱地区农业研究》
CSCD
北大核心
1995年第2期14-19,共6页
Agricultural Research in the Arid Areas
