中国农业科学Issue(23)：4728-4737,10.DOI:10.3864/j.issn.0578-1752.2015.23.014
中国主要土壤有效磷演变及其与磷平衡的响应关系
Changes in Olsen Phosphorus Concentration and Its Response to Phosphorus Balance in the Main Types of Soil in China
摘要
Abstract
[Objective]The objective of this study is to clarify the changes in available phosphorus (P) and its response to P balance (P input minus P output), and to provide a scientific basis for rational fertilization.[Method]Twenty-one monitoring sites of the main five types of soil in China with long-term conventional fertilization were chosen to explore the relationships of change of available P and P balance, available P efficiency (available P efficiency refers to the change of available P by the unit of accumulated P budget) and soil properties (pH, soil organic matter, total nitrogen and alkaline-hydrolyzable nitrogen).[Result]The P was exhausted at two monitoring sites, and accumulated at nineteen sites. The P balance in different sites ranged from -290-4 919 kg·hm-2 under conventional fertilization. Soil available P increased at 14 monitoring sites, and decreased at 2 sites. Available P increased significantly by 0.74 mg·kg-1 each year at 21 monitoring sites. Among all the sites, 81% have a significant positive correlation between changes of available P and soil P balance. Available P increased by 1.12, 3.76, 5.01, 2.34, and 0.47 mg·kg-1 with an average surplus of 100 kg P·hm-2 under fluvo-aquic soil, black soil, paddy soil, purplish soil and irrigation-silted soil. And the coefficient of variation was 25%, 52% and 68% under fluvo-aquic soil, paddy soil and purplish soil. Available P efficiency in the conventional fertilization soil was significantly correlated with the soil pH (r=0.65,P<0.01), soil organic matter content (r=0.62,P<0.01), total nitrogen (r=0.52,P<0.01) and alkaline-hydrolyzable nitrogen (r=0.63,P<0.01) .[Conclusion]The available P efficiency of different soil types ranged from 0.47-10.76 mg·kg-1. The overall trend in available P efficiency across all soil types was paddy soil>black soil>purplish soil>fluvo-aquic soil>irrigation-silted soil. The available P efficiency in the conventional fertilization soil was significantly correlated with the soil pH, soil organic matter, total nitrogen, and alkaline-hydrolyzable nitrogen.关键词
有效磷/磷平衡/有效磷效率/土壤性质/土壤类型/中国Key words
available P/P balance/available P efficiency/soil properties/soil type/China引用本文复制引用
展晓莹,任意,张淑香,康日峰..中国主要土壤有效磷演变及其与磷平衡的响应关系[J].中国农业科学,2015,(23):4728-4737,10.基金项目
国家自然科学基金（41471249）、国家公益性行业（农业）科研专项 （）
