耕地机械幻灯片.ppt

Ⅰ、Introduction Ⅱ、The nature of soil physics Ⅲ、The construction and Principle of the furrow plow Ⅳ、 The construction and Principle of the rotary tiller Ⅰ、 Introduction 1、Purpose 2、Farming methods 3、The technical requirements for the Agriculture and farming machinery 4、The type of farming machinery 1、 Purpose Arable land is in agricultural production Datian the most fundamental and important element of the work. Its purpose is cultivated in the traditional farming system and double deduction through deep soil, the stubble of crops, pests and diseases, as well as the destruction of topsoil deep tillage, which has been a long time to resume the bottom of the soil surface to turn to in order to facilitate the elimination of miscellaneous grass and plant diseases and insect pests and improve crop growth environment. 2、 Farming methods Conventional tillage，which is intensive method In the process of crop production by mechanical plowing, harrow row, such as pressure and composition of the soil tillage system. Reduced tillage Based on conventional farming to reduce the number and intensity of soil tillage as a soil conservation farming systems. 50s in the Soviet Union to promote farming Maltsev, is the use of non-wall deep plow tillage, but also are less tillage. 60 when the U.S. is also developing the farming method. 2、 Farming methods 70s Heilongjiang Province in China has also conducted a deep tillage method of testing and promotion; 80 in southern China during the rice cultivation area is too small to test and promote law and supporting the development of their agricultural. Zero tillage That is, remove the soil tillage, the use of no-tillage planter in crop stubble for seeding the surface directly, or on crop straw and stubble for direct seeding after a farming methods. . 2、 Farming methods Conversation farming Carried out on the soil surface that is porous, low-tillage, to prevent or reduce evaporation of soil mois