秧田灌水深度对水稻秧苗生长影响研究

Study on the Effects of Water Depth on Seedling Growth in Rice

杂交稻二优培九秧苗期2叶1心期至7叶期不同的灌水深度处理对秧苗分蘖及生长影响的研究表明:秧苗期灌溉水的深度与秧苗分蘖和根系生长密切相关,灌水越深,分蘖发生和根系生长越不利。浅水层灌溉,能促进秧苗分蘖的发生,促进根系生长,提高秧苗素质;而灌水深度达到4 cm,则不利于秧苗分蘖的发生和根系生长,根冠比不足。提出在水稻生产秧苗期用浅水灌溉或无水层灌溉的有效水分管理方法。

Difference in tiller and root growth of hybrid rice Liangyoupeijiu with different warer depth at seedling stage was studied. The result showed that tiller and root growth were closely correlation with the water level. The deeper level of water was, the tiller and root growth were poorer. The low level water can increase tiller and root growth, and improve the quality of rice seedling. However, when the water depth maintained 4 cm, the tiller, root growth and root-shoot ratio were inferior. Effective water manage measure at seedling stage was discussed in rice production.