华北春芝麻不同栽培条件对干物质的影响

Effect of different cultivation conditions on dry matter accumulation in spring sesame of Huabei Region

对华北春芝麻区不同栽培条件下芝麻干物质的积累、分配、转移规律进行了研究,结果表明:(1)芝麻生殖器官干重与总干物质变化一致,随生育进程而增加;(2)干物质分配,苗期以营养器官为主,蕾期、花期营养器官与生殖器官并进,以后叶片中的于物质越来越多地转移到生殖器官;(3)封顶期叶片仍保持一定的绿叶面积,能继续供给生殖器官干物质;(4)地膜覆盖比露地栽培更有利于干物质的积累、分配、转移;(5)探讨了高产生理指标。

Sesame dry matter accumulation and distribution were studied under plastic mulching and normal cultivation conditions in spring sesame of Huabei Region. The results were as follow: 1) The dry matter weight of reproductive organs and the total dry matter weight increased with the process of growing period in both cultivation conditions. 2) All dry matter of leaves was distributed to nutritive organs in seedling stage, while it was mostly transferred to reproductive organs from budding period to mature stage. 3 ) The plant population in terminal bloom- ing period still kept a certain LAI, and the leaves continued to provide dry matter for reproductive organs. 4) There were some advantages for dry matter accumulation, distribution and transfer in plastic mulching condition compared with the normal cultivation. 5) Some physiological indexes for high vield were also researched.