一、冬前整地 　　伊犁山区气候凉爽，日照充足，土壤多为栗钙土和黑钙土，土质松软肥沃，是春油菜高产栽培的有利条件。但土地大多不平整，往往造成油菜播种深浅不一致，影响出苗；又因山区多雨，往往造成降雨渍水，流水冲刷土壤，冲坏和淹死幼苗，是造成油菜减产的主要原因 First, pre-winter land preparation Ili mountain climate cool, adequate sunshine, mostly soil chestnut soil and chernozem soil, fertile soil fertility, spring rapeseed cultivation is favorable conditions. However, most of the land is not smooth, often resulting in inconsistent rapeseed sowing, affecting the emergence; and because of the rainy mountain, often resulting in rainfall, water erosion of the soil, erosion and drowning seedlings, is the main reason for the reduced yield of rape