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我场八队从1985年开始在豆茬上种甜菜,连续3年获得高产。1988年我场分别在三队、四队、十一队推广了八队豆茬甜菜的高产经验,累计种植面积2500亩,平均比麦茬甜菜增产15.58%。一、豆茬的特点1.大豆的前茬一般是麦茬秋翻地,耕层疏松深厚,大豆又是中耕作物,经过三铲三(足尚)和药剂灭草,这不仅消灭了杂草,而且还疏松和熟化了耕层。大豆的残枝落叶及根全都返还土壤,增加了耕层有机质和氮、磷、钾。另外大豆根瘤菌的固氮作用,不仅为大豆的生长发育提供了氮素营养,而且还有相当部分氮素留在耕层中,对后作的生长发育
My field eight teams began to grow beet on bean stalks in 1985, achieving high yields for three consecutive years. In 1988, our field promoted the high-yielding experience of the eight teams of beet stalks in three teams, four teams and eleven teams, respectively. The total planting area was 2,500 hectares, with an average increase of 15.58% over that of stubble beets. First, the characteristics of stubble 1. The stubble of soybeans is generally open stubble autumn wheat, deep loosening of the soil, soybeans are cultivated crops, after three shovel three (foot Shang) and pesticides, which not only eliminated the weeds , But also loose and ripened layer. Residues and roots of soybean are all returned to the soil, increasing the plow layer of organic matter and nitrogen, phosphorus and potassium. In addition soybean rhizobia nitrogen fixation, not only for the growth and development of soybean provided nitrogen nutrition, but also a considerable part of the nitrogen left in the tillage, the growth after the development