不同栽培管理模式对农田土壤团聚体组成及其碳、氮分布的影响

发布时间：2018-05-26 18:28

本文选题：栽培管理模式 + 肥力　；参考：《应用生态学报》2016年11期

【摘要】：在两种肥力条件下设置超高产栽培模式(SH)、高产高效栽培模式(HH)、农民习惯处理(FP)和不施肥对照处理(CK)4种栽培管理模式的定位试验,研究了以肥料投入为主要影响因素的不同栽培管理模式对黄淮海区域不同肥力农田耕层土壤团聚体组成及其碳、氮分布的影响,为通过培肥土壤实现小麦-玉米周年可持续增产增效提供技术支持.结果表明:与低肥力田块(LSF)相比,高肥力田块(HSF)耕层土壤团聚体的平均质量直径和几何平均直径高、分形维数低,有利于大团聚体的形成与稳定,各级团聚体的有机碳和全氮含量较高.优化施用氮磷钾肥、配施有机肥可增加耕层土壤团聚体的粒径、降低其分形维数,促进大团聚体的形成与稳定,对高肥力田块的影响大于低肥力田块;二者亦可提高有机碳和全氮在大团聚体中的含量与分布,其中,对5 mm团聚体的贡献率的影响在低肥力田块大于高肥力田块,对5~0.5 mm的各粒级团聚体的贡献率的影响在高肥力田块优于低肥力田块.
[Abstract]:Under two kinds of fertility conditions, four kinds of cultivation and management models were set up, such as super high yield cultivation model, high yield and high efficiency cultivation model, farmers' habit treatment of FPH) and CK treatment without fertilization. The effects of different cultivation and management models with fertilizer input on the composition of soil aggregate and the distribution of carbon and nitrogen in the topsoil of different fertility farmland in Huang-Huai-Hai region were studied. It provides technical support for increasing yield and increasing efficiency of wheat and maize annually through fertilizing soil. The results showed that the average mass diameter and geometric mean diameter of soil aggregates were higher and the fractal dimension was lower, which was beneficial to the formation and stability of large aggregates. The organic carbon and total nitrogen content of the aggregates were higher. The optimum application of nitrogen, phosphorus and potassium fertilizer combined with organic fertilizer could increase the particle size of soil aggregates, reduce the fractal dimension, and promote the formation and stability of large aggregates, and the effect on high fertility field was greater than that on low fertility field. They also increased the content and distribution of organic carbon and total nitrogen in large aggregates, and the contribution rate to 5 mm aggregate was greater in low fertility field than in high fertility field. The effect on the contribution rate of 5o 0.5 mm agglomerates was better in the high fertility field than in the low fertility field.
【作者单位】：作物生物学国家重点实验室/山东农业大学农学院;山东登海种业股份有限公司;
【基金】：国家自然科学基金项目(31071358,30871476) 国家重点研发计划项目(2016YFD0300106) 国家科技支撑计划项目(2013BAD07B06-2) 国家公益性行业(农业)科研专项(HY1203100,HY1203096) 山东省现代农业产业技术体系项目(SDAIT02-08) 国家现代农业产业技术体系建设项目(CARS-02-20) 山东省农业重大应用技术创新课题和山东省玉米育种与栽培技术企业重点实验室课题资助~~
【分类号】：S152.3;S153.6

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