近几年来的研究表明,丰产水稻土不但具有供給水稻生长的良好的土壤环境,而且还具有便于調节肥力因素的土壤特性。同时,在羣众經驗总結中,也发现我国农民对土壤的評价不仅有“肥瘦”之分,而且还有“好坏”之別。而判別“好坏”的标准看来也就是土壤是否易于調节其肥力因素以滿足不同作物或同一作物在不同生育时期生活的需要。土 In recent years, studies have shown that high yield paddy soil not only has a good soil environment for rice growth, but also has the soil characteristics to facilitate the adjustment of fertility factors. At the same time, in the summary of the masses’ experience, it is also found that the evaluation of the soil by our peasants is not only “fat and thin” but also “good and bad”. The criterion of discriminating “good and bad” appears to be whether soil can easily adjust its fertility factor to meet the needs of different crops or the same crop at different growth stages. earth