Effect of Integrated Nutrient Management on Soil Properties and Humus Fractions in the Long-term Fertilizer Experiments

摘要

Soil organic matter is responsible for maintenance of not only the soil physical conditions of the soil but also supplies essential plant nutrients for successful crop production. Humus, most important and largest constituent of soil organic matter, is formed by the decomposition of plant and animal residues by microorganisms. It is a store house of various nutrients essential for plant growth. Besides, humus also exerts a pronounced influence on physical, chemical and biological properties of the soil. Therefore, present study was undertaken to evaluate the impact of continuous application of fertilizers, manure and their combination on humus fractions and their contribution to soil properties.