AI Article Synopsis
- A field experiment in TaiHu Lake Basin, China tested the effects of superphosphate and manure on phosphorus (P) export during rice cultivation using zero-drainage water management.
- Prior to the first field drying, total particulate phosphorus (TPP) was the dominant P form, while dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) were found in specific treatments.
- The study concluded that zero-drainage water management can effectively minimize P export, with some retention of P in the soil.
Article Abstract
A field experiment located in TaiHu Lake Basin in China was conducted, by application of superphosphate or a mixture of superphosphate with manure, to elucidate the interception of P export during a typical rice growing season through 'zero-drainage water management' combined with sound irrigation, rainfall forecasting and field drying. P concentrations in floodwater rapidly declined before the first event of field drying, and subsequently tended to return to the background levels. Before the first field drying TPP was the predominant P form in floodwater on fields with no P input, DRP on plots that received superphosphate only, and DOP on plots treated with the mixture of superphosphate and manure. Thereafter TPP became the major form. No P export was found from the paddy fields, but a retention of 0.65kgha(-1), mainly due to soil P sorption. The results recommend the zero-drainage water management for full-scale areas for minimizing P export.
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| http://dx.doi.org/10.1016/j.envpol.2006.05.031 | DOI Listing |
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