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。 Chernozem culture experiments show that the application of crop stubble soil not only increased soil organic matter content, but also improve the soil cation exchange capacity, thereby increasing soil fertility. Correlation analysis showed that there was a significant or very significant positive correlation between soil cation exchange capacity, organic matter content, cation exchange capacity and increase of loosely-ended humus, but no significant correlation with steady-state and tight-junction humus Sex.