ABSTRACT

The present investigation was carried out in an on-going long-term fertilizer experiment, initiated during 1972 at experimental farm of Department of Soil Science, Choudhary Sarwan Kumar Himachal Pradesh Krishi Vishwavidyalaya Palampur, to study the long-term effect of fertilizers and amendments on soil physical and chemical properties in an acid Alfisol under maize–wheat cropping system. The experiment consisted of 11 treatments with 3 replications with randomized block design. The soil of the experimental site was silt loam and classified taxonomically as “Typic Hapludalf” (Subgroup). Long-term use of integrated nutrient management practices significantly improved the available Nitrogen, Phosphorus and Potassium as compared to control. Effect of long-term application of inorganic fertilizers and amendments on soil chemical properties was studied. Soil organic carbon content was increased in 100% Nitrogen, Phosphorus and Potassium + Farm Yard Manures applied plots. Application of inorganic fertilizers along with Farm Yard Manures increased the Mean weight diameter (MWD) and Geometric mean weight diameter (GMD) over control. The available Nitrogen, Phosphorus and Potassium and Diethylenetriamine pentaacetate (DTPA) extractable micronutrients cation were optimum in 100% Nitrogen, Phosphorus and Potassium + Farm Yard Manures applied treatments.

摘要

目前的调查是在一项正在进行的长期肥料试验中进行的，该试验于 1972 年在 Choudhary Sarwan Kumar Himachal Pradesh Krishi Vishwavidyalaya Palampur 土壤科学部的试验农场开始，研究肥料和改良剂对土壤的长期影响。玉米-小麦种植制度下酸性Alfisol土壤理化性质[J]. 该试验由 11 个处理组成，3 个重复，采用随机区组设计。试验地点的土壤为粉砂壤土，分类学上归类为“典型 Hapludalf”（亚组）。与对照相比，长期使用综合营养管理实践显着提高了可用的氮、磷和钾。研究了长期施用无机肥料和改良剂对土壤化学性质的影响。施用 100% 氮、磷和钾 + 农家肥的地块增加了土壤有机碳含量。无机肥料和农家肥的施用增加了平均重量直径 (MWD) 和几何平均重量直径 (GMD) 超过对照。可用的氮、磷、钾和二乙烯三胺五乙酸 (DTPA) 可提取微量营养素阳离子在 100% 氮、磷和钾 + 农家肥施用处理中是最佳的。