论文部分内容阅读
采用小区试验,研究大豆-玉米轮作模式下不同有机物料还田处理对黑土土壤活性有机碳及其组分变化特征的影响。结果表明:不同有机物料还田处理显著提高土壤总有机碳含量,与单施化肥(NPK)相比,配施有机肥(MNPK)、化肥配施生物炭(BNPK)、秸秆全量还田(SNPK)分别增加3.04%、2.44%、1.66%;不同有机物料还田措施下土壤水溶性有机碳含量分别增加46.28%、7.57%、14.18%;配施有机肥(MNPK)对土壤易氧化有机碳含量起显著的促进作用,秸秆还田(SNPK)和配施生物炭(BNPK)分别增加土壤微生物量碳17.20%和14.23%。配施有机肥能提高水溶性有机碳比例和土壤微生物量碳比例。土壤活性有机碳各组分之间存在显著相关性。有机肥与化肥的配施(MNPK)对于增加土壤活性有机碳含量和有效调控其关键组分具有重要作用。
A plot experiment was conducted to study the effects of different organic materials returning to field on the characteristics of soil active organic carbon and its components under the soybean-corn rotation model. The results showed that compared with single application of chemical fertilizers (NPK), application of organic fertilizers (MNPK), chemical fertilizers combined with biochar (BNPK), and total straw returning (SNPK ) Increased by 3.04%, 2.44% and 1.66%, respectively. The content of soil organic carbon in soil increased by 46.28%, 7.57% and 14.18%, respectively. The contents of soil organic carbon SNPK and BNPK increased soil microbial biomass carbon by 17.20% and 14.23%, respectively. The application of organic manure can increase the proportion of water-soluble organic carbon and soil microbial biomass carbon. There is a significant correlation between various components of soil active organic carbon. The combination of organic manure and chemical fertilizers (MNPK) plays an important role in increasing the content of soil active organic carbon and effectively controlling its key components.