新疆地区大豆共生固氮动态及特性

Trends and Characteristics of Soybean Rhizobium Symbiotic Nitrogen Fixation in Xinjiang Area

大豆是世界上的重要农作物,富含优质蛋白质、矿物质和维生素。因此,它既是人畜的重要食品和饲料,同时也是重要的工业原料。以大豆为中心的有机农作体制有利于保持土壤肥力,减轻环境污染。评价大豆在有机农业中的作用和地位时,人们首先注意到大豆与根瘤菌的共生固氮特性,并着眼于固氮量的估计。为查明新疆气候、土壤条件下的大豆共生固氮动态及特性,我们于1983年开始进行了大田调查,并进行了盆钵、小区试验。

The determination and analysis on the trends and characteristics of soybean rhizobium nitrogen fixation in sierozem and brown soil were carried out in Urumqi and Shihezi by adopting the methods of pot—cultivation, spot experiment and field investigation. It was established by acetylence reduction method that the acetylence reduction activity is highest in flower—pod period and reaches the highest peak at 60 clock pm of the same day. At different growth period the vegetable yield is directly proportional to the nodules amount which intergrowth in the vegetable. At flower—pod period relative symdiosis efficience of soybean root nodules amounts to 79.75%, symbiotic nitrogo(?)l fixation amounts is 71.78kg/ha every year in sierozem and 56.93kg/ha in brown soil every year.