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经~(60)Coγ射线慢性照射,诱发了一种矮秆水稻突变体。该突变体与一个大穗型品种杂交,获得了一些使阳光在冠层内分布更为有效的半矮秆植株。对这些植株同几个推广品种及亲本突变体的产量构成、不同种植密度的三种氮素水平上的产量能力和若干其它农艺性状,进行了评价。与现有推广品种比较,这种半矮秆水稻显然具有较高的净光合CO_2吸收率,并突破了由于施氮量增加而导致的产量“报酬递减法则”。通过诱发突变,可以巧妙地控制叶子的展开方式。
Chronic irradiation with ~ (60) Coγ-ray induced a dwarf rice mutant. The mutant hybridized with a large panicle type and obtained some semi-dwarf plants which made the distribution of sunlight more effective in the canopy. The yield of these three plants and the number of other agronomic traits were evaluated with the yield components of several popularized varieties and parental mutants, three nitrogen levels with different planting densities. Compared with the existing varieties, this kind of semi-dwarf rice obviously has higher photosynthetic CO 2 absorption rate and breaks through the law of diminishing returns due to the increase of nitrogen fertilizer. By inducing mutations, you can skillfully control the way the leaves unfold.