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近年来,许多研究单位和生产单位认为四百斤以上的亩产要求有机质含量在4％以上的土壤环境。我们近年的调查研究中发现:虽然比较低的土壤有机质含量(1～3％),并不是大豆上《纲要》的限制性因素。但我们分析两个农场上百个大豆地块后,也可以看出大豆产量有随着土壤有机质递增的趋势。这种趋势在岗坡地、瘠薄地和干旱年越发明显。八五二农场四分场绝大部分耕地为岗地白浆土,土壤有机质含量为3～4％,地力较
In recent years, many research institutes and production units think that more than 400 kilos of mu produce requires a soil environment containing more than 4% organic matter. In our recent investigation, we found that although the relatively low organic matter content of soil (1-3%) is not a limiting factor in the “outline” of soybean. However, after we analyzed hundreds of soybean plots on two farms, we can also see that the soybean yield tends to increase with the soil organic matter. This trend is becoming more apparent in sloppy, barren and dry years. 852 Farms quarter of the vast majority of arable land for the white soil, soil organic matter content of 3 to 4%, more than ground