两种不同土壤上镁和微肥对豇豆营养品质和产量的影响

Effects of magnesium and micro-elements fertilizers on the quality and yields of Vigna sinensis(L.)Savi in two different soil types

分别在花岗岩细砂土和花岗岩粉壤土上,采用大田小区试验研究镁和微肥对豇豆品质及产量的影响。结果表明:(1)在花岗岩细砂土上,单施Mg、B、Mo、Cu、Si及混施Mg、B、Mo、Cu对豇豆都有较好的增产效果,比对照增产10%～60%,而在花岗岩粉壤土上效果不明显;(2)与对照比较,在花岗岩细砂土上单施Mg、B、Mo、Cu、Si对降低豇豆硝酸盐含量有明显效果,其中,单施Cu和Mo的处理作用相对突出,硝酸盐含量比对照低30%和21%,但在花岗岩粉壤土上未降低豇豆硝酸盐含量;(3)细砂土上施镁和微肥有提高豇豆维生素C含量的趋势,且未降低豇豆水溶性糖含量,说明对提高豇豆品质及产量有重要作用;单施B、Cu、Mo、Si等微肥也提高了花岗岩粉壤土上的豇豆水溶性糖含量,但总体而言,粉壤土上镁和微肥的肥效相对较差。

To investigate the effect of magnesium and micro-elements fertilizers on the yields and quality of Vigna sinensis(L.)Savi,a field experiment was conducted in two different soil types.The results are as follows:(1)When the granite fine sand was applied with Mg,B,Mo,Cu and Si fertilizer individually or in a mixed way,the yields of the V.sinensis could be increased,and the increment ranged from 10% to 60%.But when applied in the same fertilizers in the granite silt loam,there was little effect on increasing the yields.(2)The nitrate content in the V.sinensis decreased effectively when the granite fine sand was applied with Mg,B,Mo,Cu and Si fertilizer,especially when treated with Cu and Mo singly,the content of nitrate in the plant was decreased by 30% and 21% respectively,in comparison with the treatment of control in which neither Mg nor micro-elements was applied.At the same time,the nitrate content in the plant was not decreased when the corresponding experiment was conducted in the granite silt loam.(3)There was a trend that the content of vitamin C of the V.sinensis was increased on the granite fine sand which applied with Mg or micro-elements fertilizer,and the water-solubility sugar content did not decrease.The content of water-solube sugar was also increased in the granite silt loam to which B,Cu,Mo,Si fertilizer was applied individually.But,as a whole,there was no distinct effect of Mg and micro-element fertilization in this soil type on V.sinensis.