摘要
通过32P与14C示踪研究表明,水稻生育后期培土,能保持和延长地上节位根的生理功能,提高水稻生育后期14CO_2同化能力,促使14C-同化产物向稻穗运输,提高灌浆速度,而且能使水稻株高、有效穗数、每穗粒数,结实率和千粒重增加,增产幅度14.11—17.67％,每亩增产稻谷53.3—53.6kg,经生物统计分析,达显著水平。
32P and 14C tracer study revealed that by moulding up the nodal roots over the ground during the late growth stage of rice the activity of physiological function of the nodal roots was kept and prolonged; the assimilating ability of 14CO2 was raised; assimilation products was promoted to be transported into the panicle of rice; the speed of filling was increased; the presenility was prevented; the hight of plants, the number of effective panicle, the number of grains per panicle, the seed setting percentage and the thousand grain weight were increased.The output was increased by 14.11-17.60% ( i.e.53.3-53.6kg per mu ) which was biomet-rically significant.
出处
《核农学报》
CAS
CSCD
1989年第2期98-103,共6页
Journal of Nuclear Agricultural Sciences
关键词
地上节位根
培土
示踪技术
水稻
Nodal root, moulding up, ^(32)P and ^(14)C tracer, rice
