ABSTRACT Information on phosphorus (P) dynamics in soil is crucial for careful management of phosphorus fertilization in respect to the sustainable development of agriculture in IGP regions. The sorption and desorption of phosphate, different fractions of phosphate, dehydrogenase activity, acid and alkaline phosphatase activity were studied in soils under organic inorganic and integrated nutrient management practices in four different cropping systems. The P adsorption maxima of long-term organic soil was highest (77.52 µg P g−1) under coarse rice-barley-green gram cropping system. The bonding energy of phosphorus in the soil solution varies from 0.38 to 0.20 ml µ−1. Average across the cropping systems, the bonding energy of adsorb P were 68.54% and 39.05% higher under organic and integrated nutrient-managed plots respectively as compared to the inorganic nutrient management. Maximum buffering capacity of phosphate was observed (29.59 ml g−1 soil) under Coarse rice-barley-green gram cropping systems in organic nutrient management practice. Application of organic nutrient management practice increases 26.04% higher water-soluble phosphorus (WSP) as compared to the inorganic nutrient management practice, average across the cropping systems. All other fractions of phosphorus in the soil were higher under inorganic nutrient management that leads to higher amount of total of phosphorus, average across the cropping systems. Long-term application of organic for 14 years increases the bonding energy and adsorption capacity for P in soil but decreased its desorption potential, increasing P availability to the plant and leading to higher P uptake irrespective of cropping systems.

中文翻译：

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有机、无机和综合养分管理对印度典型 Ustochrept 土壤不同种植系统下磷动态的长期影响

摘要 土壤中磷（P）动态信息对于 IGP 地区农业可持续发展的磷肥施肥管理至关重要。在有机无机和综合养分管理实践下，在四种不同的种植系统中研究了土壤中磷酸盐的吸附和解吸、不同比例的磷酸盐、脱氢酶活性、酸性和碱性磷酸酶活性。在粗稻-大麦-绿克种植系统下，长期有机土壤的 P 吸附最大值最高（77.52 µg P g-1）。土壤溶液中磷的键能从 0.38 到 0.20 ml µ-1 不等。平均跨种植系统，吸附 P 的键能分别为 68.54% 和 39。与无机养分管理相比，有机和综合养分管理地块分别高 05%。在有机养分管理实践中，在粗稻 - 大麦 - 绿克种植系统下观察到磷酸盐的最大缓冲能力（29.59 ml g-1 土壤）。与无机养分管理实践相比，有机养分管理实践的应用增加了 26.04% 的水溶性磷 (WSP)，在整个种植系统中平均。在无机养分管理下，土壤中所有其他磷含量都较高，这导致整个种植系统的磷总量较高。长期施用有机肥 14 年增加了土壤中 P 的结合能和吸附能力，但降低了其解吸潜力，