Matches in SemOpenAlex for { <https://semopenalex.org/work/W2368045952> ?p ?o ?g. }
Showing items 1 to 78 of
78
with 100 items per page.
- W2368045952 abstract "As the largest concentrative distribution area for freshwater marshes in China,Sanjiang Plain is of great ecological value for its function of regulating climate,preserving water sources,and protecting biodiversity,etc.Meanwhile,it is one of the main grain-producing areas in China which supplies a significant amount of grain.In order to increase the grain production,paddy field became a major land use type in Sanjiang Plain in recent years,which may lead to adverse effects for water and wetland system because of the nonpoint source pollutants export.Thus,researches on the mechanism of nonpoint source pollution in paddy field are urgent and important for protecting the wetland system and preventing water quality degradation.This study aimed to discuss the export mechanism of phosphorus from paddy field in Sanjiang Plain.Different scales of in-situ experiments were performed to study the concentrations of phosphorus,the intercepting ratio of bund to phosphorus,the lateral seepage velocity during the export process,and to quantify the annual export load of phosphorus.Furthermore,the transport process of phosphorus in drainage systems was also discussed.The artificial drainage,surface runoff and lateral seepage through bund are the three ways of phosphorus export.In the study,the water quantity of artificial drainage and surface runoff was estimated by the summation of each drainage process or runoff event,and the water quality was calculated by the weighted average concentration of phosphorus;the quantity of lateral seepage was calculated by the change of water level,the rainfall and evaporation date according to water-balance of a trench near the paddy field,the quality of lateral seepage water was determined by the weighted average of phosphorus in seepage water sampled from different soil depths.The 102 water samples were sampled from the trench-drain-marshy river-river system before and after the two artificial drainage(in May and August)events so as to test the natural purification ability of the system.The results showed that the near-trench bund played an important role in intercepting the total phosphorus and the dissolved total phosphorus,the maximum intercepting ratio of bund to total phosphorus and the dissolved total phosphorus reached about 90% and 80%,respectively.The mean intercepting ratio reached about 50%-60%,and with the increasing of the width of bund,the intercepting ability increased.Under the current cultivation mode,the export load of total phosphorus and dissolved phosphorus from paddy field was 0.19 t/km2 per year and 0.02 t/km2 per year,respectively,accounting for 9.85 and 1.12 percent of the total fertilizer applied,respectively.The phosphorus export by ways of artificial drainage and surface runoff were more than that of lateral seepage.After discharging from the paddy field,the concentration of phosphorus decreased by steps in the trench-drain-marshy river-river system,demonstrating that the drainage system had good purification ability beside its function of transporting water.The enhancement of field management,the construction of trench and drain,the protecting of marshy rivers should be taken into consideration in controlling the nonpoint source pollution and the receiving water degradation." @default.
- W2368045952 created "2016-06-24" @default.
- W2368045952 creator A5033480994 @default.
- W2368045952 date "2010-01-01" @default.
- W2368045952 modified "2023-09-26" @default.
- W2368045952 title "Export of Phosphorus from Paddy Field and Its Transport Process in Sanjiang Plain" @default.
- W2368045952 hasPublicationYear "2010" @default.
- W2368045952 type Work @default.
- W2368045952 sameAs 2368045952 @default.
- W2368045952 citedByCount "1" @default.
- W2368045952 countsByYear W23680459522013 @default.
- W2368045952 crossrefType "journal-article" @default.
- W2368045952 hasAuthorship W2368045952A5033480994 @default.
- W2368045952 hasConcept C127313418 @default.
- W2368045952 hasConcept C179006392 @default.
- W2368045952 hasConcept C187320778 @default.
- W2368045952 hasConcept C18903297 @default.
- W2368045952 hasConcept C191897082 @default.
- W2368045952 hasConcept C192562407 @default.
- W2368045952 hasConcept C2776026763 @default.
- W2368045952 hasConcept C2780797713 @default.
- W2368045952 hasConcept C39432304 @default.
- W2368045952 hasConcept C50477045 @default.
- W2368045952 hasConcept C510538283 @default.
- W2368045952 hasConcept C6557445 @default.
- W2368045952 hasConcept C67268981 @default.
- W2368045952 hasConcept C67592535 @default.
- W2368045952 hasConcept C67715294 @default.
- W2368045952 hasConcept C76886044 @default.
- W2368045952 hasConcept C85582077 @default.
- W2368045952 hasConcept C8625798 @default.
- W2368045952 hasConcept C86803240 @default.
- W2368045952 hasConcept C87717796 @default.
- W2368045952 hasConceptScore W2368045952C127313418 @default.
- W2368045952 hasConceptScore W2368045952C179006392 @default.
- W2368045952 hasConceptScore W2368045952C187320778 @default.
- W2368045952 hasConceptScore W2368045952C18903297 @default.
- W2368045952 hasConceptScore W2368045952C191897082 @default.
- W2368045952 hasConceptScore W2368045952C192562407 @default.
- W2368045952 hasConceptScore W2368045952C2776026763 @default.
- W2368045952 hasConceptScore W2368045952C2780797713 @default.
- W2368045952 hasConceptScore W2368045952C39432304 @default.
- W2368045952 hasConceptScore W2368045952C50477045 @default.
- W2368045952 hasConceptScore W2368045952C510538283 @default.
- W2368045952 hasConceptScore W2368045952C6557445 @default.
- W2368045952 hasConceptScore W2368045952C67268981 @default.
- W2368045952 hasConceptScore W2368045952C67592535 @default.
- W2368045952 hasConceptScore W2368045952C67715294 @default.
- W2368045952 hasConceptScore W2368045952C76886044 @default.
- W2368045952 hasConceptScore W2368045952C85582077 @default.
- W2368045952 hasConceptScore W2368045952C8625798 @default.
- W2368045952 hasConceptScore W2368045952C86803240 @default.
- W2368045952 hasConceptScore W2368045952C87717796 @default.
- W2368045952 hasOpenAccess W2368045952 @default.
- W2368045952 hasRelatedWork W1533968185 @default.
- W2368045952 hasRelatedWork W1850094792 @default.
- W2368045952 hasRelatedWork W1964713532 @default.
- W2368045952 hasRelatedWork W2019778776 @default.
- W2368045952 hasRelatedWork W2071264813 @default.
- W2368045952 hasRelatedWork W2261889653 @default.
- W2368045952 hasRelatedWork W2313505727 @default.
- W2368045952 hasRelatedWork W2349234136 @default.
- W2368045952 hasRelatedWork W2356784080 @default.
- W2368045952 hasRelatedWork W2362978715 @default.
- W2368045952 hasRelatedWork W2382435821 @default.
- W2368045952 hasRelatedWork W2383298214 @default.
- W2368045952 hasRelatedWork W2403189667 @default.
- W2368045952 hasRelatedWork W2403560583 @default.
- W2368045952 hasRelatedWork W2592195602 @default.
- W2368045952 hasRelatedWork W2883686679 @default.
- W2368045952 hasRelatedWork W2956350167 @default.
- W2368045952 hasRelatedWork W3108392522 @default.
- W2368045952 hasRelatedWork W3150950412 @default.
- W2368045952 hasRelatedWork W350637303 @default.
- W2368045952 isParatext "false" @default.
- W2368045952 isRetracted "false" @default.
- W2368045952 magId "2368045952" @default.
- W2368045952 workType "article" @default.