作物根茬对土壤肥沃状况的影响

Effect of Crop Root Residue on Soil Fertility

摘要:

通过黑钙土的培养试验,表明了作物根茬施入土壤后不仅提高了土壤有机质含量,而且提高了土壤阳离子交换能力,从而提高了土壤的肥沃状况。相关分析表明,土壤阳离子交换量与有机质含量、阳离子交换量的增加量与松结态腐殖质的增加量均呈显著或极显著的正相关,而与稳结态及紧结态腐殖质无显著的相关性。

Abstract:

The culture experiments were taken to study the effect of crop root residues (CRR) on the soil fertility in chernozem. The results were shown as follow:After CRR were applied into the soil, the content of soil organic matter was increased, the quality of soil organic matter was improved, and the cation exchange capacity (CEC) of the soil also was raised, therefore, the soil fertility was improved. The correlation analysis showed that the interrelation between CEC and content of soil organic matter was significantly positive, the positive correlation between the added amount of CEC and the added amount of loosely combined humus also was significant. However, CEC had no significant correlation with stablely combined humus and tightly combined humus.