农业环境科学学报Issue(3)：501-508,8.DOI:10.11654/jaes.2015.03.012
两种外源性有机物料对设施土壤磷变化的影响
Effects of Two Organic Amendments on Phosphorus Transformation in Greenhouse Soil
摘要
Abstract
Greenhouse soils are different from common agricultural soils in nutrient transformation, due to high temperature and moisture. In this study, the effects of rice straw and peat applications on the transformation of phosphorus(P)in a greenhouse vegetable soil were studied in a laboratory incubation. Dynamics of soil microbial biomass P(MBP), available P(Olsen-P)and readily desorption P(CaCl2-P)were ex-amined during a 90-day experimental period. Inorganic P was fractionationed as aluminum(Al-P), ferric(Fe-P), calcium(Ca-P)and oc-cluded P(O-P), while organic P as labile organic P(LOP), moderately labile organic P(MLOP), moderately resistant organic P(MROP) and highly resistant organic P(HROP). Compared to the control, soil MBP increased by 111.1%~310.0%and 197.7%~356.3%following rice straw amendments at 2 gC·kg-1 and 4 gC·kg-1, respectively, while it increased by 23.7%~54.6%and 63.2%~157.1%following peat additions at 2 gC·kg-1 and 4 gC·kg-1 peat, respectively. Soil Olsen-P decreased by average 15.0%and 20.2%after additions of rice straw at 2 g C·kg-1 and 4 g C·kg-1, respectively. However, peat additions did not significantly change soil Olsen-P until 45 days of incubation. Soil CaCl2-P kept declining after 30 days of incubation. After 90-day incubation, rice straw and peat reduced CaCl2-P by average 21.3%and 10.9%, respectively, in comparison with the control. By comparing the percentages of each P fractions over total P at the end of incubation, rice straw and peat both enhanced the conversion of Al-P, Fe-P, O-P, LOP and HROP to LOP and MROP. The correlation coefficients be-tween MBP, Olsen-P, CaCl2-P and Fe-P fractions were statistically significant at P<0.05. In conclusion, rice straw and peat amendments would help control P transformations in greenhouse soils, with rice straw more effective than peat. Fe-P may be a vital chemical fraction in regulating cycling, transformation and runoff of phosphorus in greenhouse soils.关键词
土壤磷/转化/设施菜地/磷形态/外源性有机物料Key words
soil phosphorus/transformation/greenhouse vegetable soil/phosphorus fraction/organic amendments分类
资源环境引用本文复制引用
黄敏,尹维文,余婉霞,周开来,黄永炳,石小娟..两种外源性有机物料对设施土壤磷变化的影响[J].农业环境科学学报,2015,(3):501-508,8.基金项目
国家自然科学基金青年科学基金项目（41101210）；武汉理工大学国家级大学生创新创业训练计划项目 （）
