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土壤有机质对作物的产量有着直接关系。有机质是由动植物腐败残体衍生而来,富含有机质的黑色土壤是高肥力土壤的标志。农业上千方百计把动植物残体归还土壤,使土壤有机质含量保持高水平。但近年片面强调化学肥料的利用,给生产带来许多问题。不可否认,化学肥料的使用确实提高了作物产量,开创了绿色革命的时代,为日益增长的人口提供粮食与纤维。但与此同时对土壤却有极大的负作用。土壤的抗性和适应性减弱,
Soil organic matter has a direct relationship with crop yield. Organic matter is derived from the decay of animal and plant residues, rich in organic black soil is a symbol of high-fertility soils. Farms do everything possible to return animal and plant debris to the soil, so that soil organic matter content to maintain a high level. However, the unilateral emphasis on chemical fertilizer utilization in recent years has brought many problems to production. It is undeniable that the use of chemical fertilizers did increase crop yields, opened the era of a green revolution and provided food and fiber to a growing population. But at the same time it has a great negative effect on the soil. Soil resistance and adaptability weakened,