Abstract:
:Soil organic phosphorus (SOP) can greatly contribute to plant-available P and P nutrition. The study was conducted to determine the effects of organic amendments on organic P fractions and microbiological activities in paddy soils. Samples were collected at the Changshu Agro-ecological Experiment Station in Tahu Lake Basin, China, from an experiment that has been performed from 1999 to 2004, on a paddy soil (Gleysols). Treatments consisted of swine manure (SM), wheat straw (WS), swine manure plus wheat straw (SM + WS), and a control (chemical fertilization alone). Organic amendments markedly increased soil total organic phosphorus (TOP) and total organic carbon (TOC), especially in continuously flooded conditions. Based on the fractionation of SOP, organic amendments significantly increased soil labile organic phosphorus (LOP), moderately labile organic phosphorus (MLOP), and moderately stable organic phosphorus (MSOP) compared with the control. For SM and SM + WS treatments, LOP in continuously flooded soils decreased by 30.1 and 36.4%, respectively, compared to intermittently flooded soils. In organically amended soils, continuous flooding showed significantly lower microbial biomass phosphorus (MBP) and alkaline phosphatase activities (APA) than intermittent flooding. In intermittently flooded conditions, incorporating organic amendments into soil resulted in greater P uptake and biomass yield of rice than the control. In the intermittently flooded soils, APA (P < 0.05) and MBP (P < 0.01) were significantly and positively related to TOP, LOP, MLOP, and MSOP, whereas in continuously flooded soils, there was a significant (P < 0.05) negative relationship between MBP, TOP, and MSOP. Based on soil organic P fractions and soil enzymatic and microbiological activities, continuous flooding applied to paddy soils should be avoided, especially when swine manure is incorporated into paddy soil.
journal_name
J Environ Qualjournal_title
Journal of environmental qualityauthors
Yang C,Yang L,Jianhua Ldoi
10.2134/jeq2005.0194subject
Has Abstractpub_date
2006-05-31 00:00:00pages
1142-50issue
4eissn
0047-2425issn
1537-2537pii
35/4/1142journal_volume
35pub_type
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doi:10.2134/jeq2005.0282
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journal_title:Journal of environmental quality
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pub_type: 杂志文章
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journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0524
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doi:10.2134/jeq2016.02.0050
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journal_title:Journal of environmental quality
pub_type: 杂志文章
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journal_title:Journal of environmental quality
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pub_type: 杂志文章
doi:10.2134/jeq2001.3051710x
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journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0042
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journal_title:Journal of environmental quality
pub_type: 杂志文章
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journal_title:Journal of environmental quality
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pub_type: 杂志文章,评审
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