Autor: F. F. Ernst, J. A. Knuteson, Scott R. Yates, Dong Wang, George E. Brown
Rok vydání: 2001
Předmět:
Zdroj: Water, Air, and Soil Pollution. 127:109-123
ISSN: 0049-6979
DOI: 10.1023/a:1005299632176
Popis: Atmospheric emission of volatilepesticides can be a significant source of airpollution. A field study was conducted to reduce1,3-dichloropropene (1,3-D) emission by applying thechemical via subsurface drip irrigation with a reduceddosage (4.7 g m-2 or 47 kg ha-1). Comparisons were made between ashallow drip application with the plot covered with apolyethylene film, a deep drip application and aconventional shank injection (at 11.2 g m-2) withthe plots left as bare soil surface. For eachtreatment, seven replicated active flux chambers wereused continuously to measure 1,3-D loss until nomeasurable emission was found. Results indicated thattotal 1,3-D emission loss was over 90% for the shankinjection, and 66 and 57% for the shallow and deepdrip plots, respectively. The emission loss wasextremely high for shank injection since about 80%were lost from the bed furrows where the slantedshanks left uncompacted fractures. On mass basis, theshank plot lost 10.4 g m-2, whereas the shallow-and deep-drip plots lost 3.1 and 2.7 g m-2,respectively. Applying 1,3-D using subsurface dripirrigation with reduced dosage has a great potentialfor emission reduction.
Databáze: OpenAIRE
Externí odkaz: