四川农业大学学报 ›› 1995, Vol. 13 ›› Issue (04): 545-549.doi: 10.16036/j.issn.1000-2650.1995.04.030

• 研究论文 • 上一篇    下一篇

攀西地区杂交水稻施用钾肥的效应研究

马均, 孙晓辉   

  1. 四川农业大学水稻研究所, 雅安市 625014
  • 收稿日期:1995-05-20 出版日期:1995-12-31 发布日期:2017-04-22

STUDY ON THE RESPONSES OF HYBRID RICE TO POTASSIUM FERTILIZER IN PANXI REGION

Ma Jun, Sun Xiaohui   

  1. Rice Research Institute, Sichuan Agricultural University, Yaan, Sichuan, China 625014
  • Received:1995-05-20 Online:1995-12-31 Published:2017-04-22

摘要: 本文研究了在两个氮素水平下杂交水稻施钾的增产效应.结果是:攀西稻作区稻田普遍缺钾,施钾有显著的增产效应,但过量施钾会降低稻谷产量,稻谷产量与施钾量呈显著的二次曲线关系.施钾可增大叶面积和干物重,提高实粒数、结实率与千粒重,但过量施钾及施氮则有一定的负效应.施钾对有效穗数无影响。在攀西稻作区,经济上的最佳施肥量为:N150kg/ha、K2O117.9kg/ha,稻谷产量可达11196.7kg/ha,氮、磷、钾三要素之比是2:1:1-2.

关键词: 杂交水稻, 钾, 产量, 效应, 水稻

Abstract: The responses of hybrid rice to potassium (K) fertilizer at two N levels were studied in Panxi Rice Plant Region. The results were as follows:Panxi Rice Plant Region is the K deficient one and the application of K fertilizer increased the rice grain yield significantly by 3.50-9.12%, but the grain yield reduced at high K level. The grain yield was significant quadratic curves correlation with the amount of K applied. The application of K fertilizer increased the leaf area, dry matter weight, number of filled grains, filled grains percentage and 1000-grains,eight, but the high level K and N (225kg K2O/ha and 225kg N/ha)were unfavourable. The application of K fertilizer has no effect on the number of panicles. The optimum economical fertilization rates were 150kg N/ha and 117.9kg K2O/ha, and the grain yield was 11196.7kg/ha correspondently,the ratio of N:P2O6: K2O was 2:1:1-2.

Key words: HYBRID RICE, POTASSIUM (k), YIELD, RESPONSE, PADDY

中图分类号: 

  • S511.1