土壤管理ppt課件-資料下載頁
2025-01-09 08:51本頁面
【正文】 工具修整 ；先進(jìn)的做法是用起壟機(jī)械一次完成作業(yè)。因此， 起壟也可以視為一種基本耕作措施。壟作耕作制度 Ridging tillage systemWhat is minimum tillage?最少耕作Only apply the most essential tillage。Delay primary tillage until seeding. 鐵茬播種 不中耕What are the benefits of minimum tillage?1) Soil surface is left covered residue (conserve moisture)。2) Residue protects soil from erosion。3) Reduced costs (fewer operations)。4) Soil tilth improved (less paction)? Weeds are controlled with chemicals.Notillisoneofthecentury39。sbiggestbreakthroughsinagriculturaltechnology.Itgivesmeaningtothetermsustainableagriculture,becauseitispractical,profitable,maintainsproductiontargets,andprotectssoilandwaterqualityonandoffthefarm.Notill system免耕制Inanotillcropproductionsystem:? the field is left virtually undisturbedfromharvesttoplanting,exceptfornutrientinjection?fieldsarenolongerplowed,andplant residues remain on the soiltoofferprotectionfromerosion?anarrowseedbed is prepared by the planterordrillduringtheplantingoperation,toallowadequateseedandfertilizerplacement?alternatively,therowstripmaybepretilledduringaseparatepass? weed controlisacplishedprimarilywithherbicides,butshallowinterrowcultivationmaystillbeusedforemergencyweedcontrol.Notill Defined 免耕的技術(shù)要素 1. 以生物措施代替機(jī)械的基本耕作措施松土、改善耕層構(gòu)造的作用；2. 以化學(xué)措施代替?zhèn)鹘y(tǒng)措施的機(jī)械除草、翻埋害蟲和病菌的作用。Notill免耕的技術(shù)原理
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