大豆钼素研究

STUDY ON MOLYBDENOM SOYBEAN

本文报导了我国黄淮及长江中下游大豆产区土壤有效钼低于０．１５ｐｐｍ的点次达９８％，在缺钼条件下，钼主要分布于大豆根和叶，不缺钼则主要存在于根和茎中，后期钼主要贮于种子中；大豆有富集钼功能；缺钼大豆的光合作用和固氮酶活性降低。硝酸还原酶（ＮＲ）活性及叶绿素含量，在水培介质为０．０５—０．１ｐｐｍ范围内，与钼浓度正相关；大豆各器官及全株干重变化亦有类似趋势；施钼提高了除胱氨酸和异亮氨酸外的其它１５种氨基酸含量，而油酸和亚油酸含量则有所下降；施钼大豆平均增产１７％。

Molybdenum has beau found deficient in soil of soybean producing area in Huang-Huai-Haiplain and the middle and lower reaches of Yangte River. Available soil Molybdenum concentration less than 0.15ppm and 98% in the area is deficient of Molybdenum. The results of waterculture experimont showed that:(1)Under the condition of Mo deficiency, Molybdenum mainlylocated in the roots and leaves.On the contrary,Molybdenum was mainly stored in the sceds.(2)Soybean had the function of poolling Molybdenum.(3)The photosynthesis and the azotaseactivity were decreased in Mo deficient soybean.The activity of nitrate redutase and the contentsof chlorophyll had positive correlation with Mo concentrations within the range of 0.05-0.1ppmin water culture.(4)The plant any weight and individual organ dry weight also had pisitive cor relations with the Mo concentrations.(5)Molybdenum application increased the contents of 15amino acids except cystine and isoleucine,reduced the oleic acid and linolic acid contents.(6)Molybdenum application inereased the yield about 17% on the average.