甜菜个体发育规律及其高产高糖对策栽培技术研究

Preliminary Approach on Regularity of ontogeny and Its Culture Technicsof High Yield and High Sugar in Sugarbeet

甜菜营养生长过程中，依据根、叶生长及糖分积累特点，将其个体发育划分为４个时期：块根分化形成期、叶丝快速生长期、块根膨大期、糖分积累期，从协调根产量与含糖率关系出发，欲建立合理的群体结构，其高产高糖农艺措施制定，必须考虑对甜菜生产力影响最大的亩株数、块根含糖率、叶丛初期干物质分配率及糖分积累期叶面积指数４个因子，故提出了灌溉农业对策栽培应围绕前促后控。

The ontogeny was divided into four stages according to the trait of root and leaf growthand sugar accumulating during sugarbeet vegetation growth:lst was root differentiation andforming period,2nd was rosette growing rapidly,3rd was root expanding and 4th was sugaraccumulation. Reasonable population structure must be constructed for harmonizing the rela-tion of root yield and sugarcontent,when its agronomical measures of high yield and highsugar were made,the four factors of plants in a acre and sugar content in root and dry matterdistributing rate during early stage of rosette growth and LAI during sugar accumulatingstage that effect greatly on productive forces of sugarbeet were be considered,thus,the cul-ture technics of irrigation agriculture are surrounding the principles of acceleration in theearly stage and controlling in the late stage and acceleration by fertilizer and controlling bywater.