几种植物生长调节剂对水稻氮素积累与转运及贮存的影响

Effects of Several Plant Growth Regulators on Accumulation, Transportation and Storage of Nitrogen in Rice

为了植物生长调节剂的开发利用,给提高水稻籽粒蛋白质含量新技术的推广提供理论依据,采用盆栽试验探讨了几种植物生长调节剂对水稻氮代谢、籽粒、糙米蛋白质含量、籽粒蛋白质产量的影响.结果表明:早稻籽粒灌浆期间功能叶、茎鞘的全氮、蛋白氮含量随着生育期的延长而逐渐减少,其减少幅度是各喷施植物生长调节剂处理明显高于对照.各喷施植物生长调节剂处理早稻籽粒的全氮、蛋白氮含量在灌浆的5个时期均高于对照;黄熟期早稻籽粒的全氮、蛋白氮含量的大小顺序与糙米的全氮、蛋白氮含量的大小顺序均依次为:PGR4,PGR3,PGR2,PGR1,PGR5,对照.早稻籽粒的蛋白质产量也是各喷施植物生长调节剂处理高于对照,其中PGR4处理最高,PGR3处理次之.

This paper is an attempt to probe into the effects of several new plant growth regulators on rice nitrogen metabolism, grain and brown rice protein contents and grain protein yield which serve as the theoretical basis for exploiting new plant growth regulators (PGR) and popularizing new technology of increasing rice protein content. Results show that total N content and protein N content in the functional leaves and stemsheath of early rice is decreased gradually with rice growth stage prolonging. Research results of the experiments in early rice also reveals that total N content and protein N content of treatments PGR in five stages are higher than that of CK and so are their decrements. In ripe stage, both total N content and protein N content in grain and in brown rice are in the order of PGR4>PGR3>PGR2>PGR1>PGR5>CK. The protein yield of grain in early rice show the same trend. Of all these treatments, total N content and protein N content in brown rice of treatment PGR4 is the highest,with PGR3 the second.