摘要
在大田高产栽培条件下,对具代表性的17个粳稻品种在不同施肥水平下的氮素吸收与利用关系进行了研究。结果表明:不同粳稻品种植株含氮率随着生育进程的推进,差异性明显;作物产量水平提高,植株含氮率则相对较低;植株总吸氮量与产量呈显著正相关(r=0.5497*);氮经济产量生产力随着水稻品种生育期延长与作物品种产量的提高而逐渐提高,提高水稻品种基因型的氮生物产量生产力、收获指数及氮素收获系数,可显著提高品种的氮经济产量生产力与作物产量。同时,不同生育阶段、不同施肥水平下的水稻植株含氮率、吸氮量、氮经济产量生产力及其构成因子间亦具有较大差异。
The relationship between nitrogen absorption and nitrogen utilization was studied on seventeen rice varities. The results were as follows: Significant variances of nitrogen content of different lines of rice were found when it reached mature stage; The higher the grain output was, the lower nitrogen it contained; Noticeable positive correlation could be found between the total nitrogen content and grain yield (r=0.5497*); Output of nitrogen production (ONP) was gradually improved with the growth duration becoming longer; ONP and grain yield could be greatly improved when nitrogen utilization, harvest index, and yield weight per unit nitrogen weight were uplevelled. Significant variances could also be observed of the amount of nitrogen content, the amount of nitrogen uptaken, ONP and its compenents at different growth stage and under different level of fertilization.
出处
《扬州大学学报（农业与生命科学版）》
CAS
CSCD
2002年第4期43-46,65,共5页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
江苏省农业三项工程项目
