硼处理下大豆根系性状与产量关系的研究

RELATIONSHIP BETWEEN ROOTS CHARACTER AND YIELD OF SOYBEAN UNDER THE CONDITION OF BORON

缺硼可导致大豆不结实,根系是缺硼最敏感的部位。本试验采用盆栽方法,对生产中普遍使用并对硼敏感的大豆品种(Glycine max(L.)Merrill)北9395的根系性状与产量关系进行研究。结果表明:B+处理的主根长、主根粗、主根干重、侧根数、侧根总长度、侧根干重、须根干重、根干重、根体积和根系总吸收面积均有所增加,其中主根粗、侧根数、总侧根长与B0对比差异达到0.01显著水平;硼在一定程度上能增加单株粒数和单株粒重;根系性状及其与产量之间存在一定程度的相关性,主根生长的好坏可以作为评价其它根系性状的重要指标;主根干重和根干重与产量之间的相关系数在0.05水平上均达到显著,可以作为判断大豆产量的重要指标。

The boron deficiency would result in no seed of soybean, and root was the sensitive part to boron. This paper using pot experiment, studied the relationship between roots character and the yield of soybean north 9395 （Glycine max （L.） Merrill） under the condition of boron, which was cropped prevalently and sensitive to boron. The results showed： length of taproot,diameter of taproot,dry weight of taproot, number of lateral root, total length of lateral root, dry weight of lateral root,dry weight of fibre, dry weight of root, root volume and total absorbable areas of root with boron supplied were all increased in certain degrees, among which diameter of taproot,number of lateral root and total length of lateral root had significant difference at a=0. 01 level to B0 ; the supplied B could increase the number of seed and the weight of grain per plant to certain extent; the character of roots and relationship between the characteristics of roots and yield had certain correlations, the growing circs of taproot was a important index to judge other root characteristic;dry weight of taproot and dry weight of root had significant difference at a=0.05 level to yield,which considered the main index to judge the soybean yield.