{"title":"表面施用的磷酸盐和水通过非饱和土壤的运动","authors":"G. Singh, Z. Singh, I.S. Dahiya, R.S. Malik","doi":"10.1016/0304-3746(83)90009-4","DOIUrl":null,"url":null,"abstract":"<div><p>The simultaneous movement of surface-applied phorate and water was studied in laboratory columns containing, initially, moist and dry sandy loam soil. Phorate was applied onto the soil and leached with water under ponded and controlled infiltration conditions. Phorate and water distribution profiles were determined by destructive sampling at two stages: (1) immediately following infiltration and (2) after matching total infiltration, redistribution and evaporation time for two water-application rates. Regardless of the initial soil water content, just after the termination of infiltration, phorate was displaced more efficiently and its concentration peak formed at deeper depth with the slower than with the faster application rate. Following redistribution, this trend was reversed. Phorate movement was also found to be dependent on the initial soil water content. The higher the initial soil water content, the deeper and more complete was the displacement of phorate during infiltration and redistribution.</p></div>","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 3","pages":"Pages 259-263"},"PeriodicalIF":0.0000,"publicationDate":"1983-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(83)90009-4","citationCount":"4","resultStr":"{\"title\":\"Movement of surface-applied phorate and water through unsaturated soil\",\"authors\":\"G. Singh, Z. Singh, I.S. Dahiya, R.S. Malik\",\"doi\":\"10.1016/0304-3746(83)90009-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The simultaneous movement of surface-applied phorate and water was studied in laboratory columns containing, initially, moist and dry sandy loam soil. Phorate was applied onto the soil and leached with water under ponded and controlled infiltration conditions. Phorate and water distribution profiles were determined by destructive sampling at two stages: (1) immediately following infiltration and (2) after matching total infiltration, redistribution and evaporation time for two water-application rates. Regardless of the initial soil water content, just after the termination of infiltration, phorate was displaced more efficiently and its concentration peak formed at deeper depth with the slower than with the faster application rate. Following redistribution, this trend was reversed. Phorate movement was also found to be dependent on the initial soil water content. The higher the initial soil water content, the deeper and more complete was the displacement of phorate during infiltration and redistribution.</p></div>\",\"PeriodicalId\":100066,\"journal\":{\"name\":\"Agro-Ecosystems\",\"volume\":\"8 3\",\"pages\":\"Pages 259-263\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1983-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0304-3746(83)90009-4\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Agro-Ecosystems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0304374683900094\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Agro-Ecosystems","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304374683900094","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Movement of surface-applied phorate and water through unsaturated soil
The simultaneous movement of surface-applied phorate and water was studied in laboratory columns containing, initially, moist and dry sandy loam soil. Phorate was applied onto the soil and leached with water under ponded and controlled infiltration conditions. Phorate and water distribution profiles were determined by destructive sampling at two stages: (1) immediately following infiltration and (2) after matching total infiltration, redistribution and evaporation time for two water-application rates. Regardless of the initial soil water content, just after the termination of infiltration, phorate was displaced more efficiently and its concentration peak formed at deeper depth with the slower than with the faster application rate. Following redistribution, this trend was reversed. Phorate movement was also found to be dependent on the initial soil water content. The higher the initial soil water content, the deeper and more complete was the displacement of phorate during infiltration and redistribution.