水稻根系特征与地上部关系的研究初报

选用１２个不同穗型水稻品种为材料，对供试品种的根系特征与地上部性状关系进行了分析，研究初步表明：种子根特征受种子千粒重影响较大；每株不定根数与每株分蘖数和穗数呈显正相关。

PRELIMINARY STUDIES ON THE RELATIONSHIP BETWEEN THE CHARACTERISTICS OF ROOTS AND SHOOTS IN RICE

Twelve rice varieties with different panicle types were chosen as the experimental materi-als. The relationship between the characteristics of roots and shoots among the varieties wasanalyzed.The results showed that the Characteristics of radicle were much affected by the seedweight;there was a close positive relationship between the number of nodal roots per plant andthe number of tillers and panicles per plant;the length of nodal root was also related with thelength of panicle;there were close positive reiationships between the diameter of nodal root andthe width of leaf,the diameter of stem,the number of the first rachis-branchs and the sec-ond rachis-branchsi per panicle,the number of spikeletsi per panicle;there was a close nega-tive relationship between the diameter of nodal root and the panicie number per plant;the rootweight was closely related with the shoot weight;the relationships of the numbers of nodalroots, root weights and root diameters in different growth stages were also significant.