水分胁迫和氮素形态对水稻生长影响的研究

Study on the effect of water stress and nitrogen on rice growth

六福A(籼型不育系)、丰优2号(籼型三系杂交稻)、连粳11号(粳型常规稻)等3种不同品种水稻在不同水分胁迫和不同形式的氮素的影响下,观察分析其幼苗产生的一些变化。结果表明:不同品种水稻的叶部和根部的硝态氮的含量,均随着营养液中硝态氮含量的增加而增加。一定的水分胁迫(10%PEG溶液)可以较为明显地增加叶部和根部中硝态氮的含量。氨态氮则与硝态氮有相同的反趋势;一定程度上的水分胁迫对根系的生长是有利的,导致的根系的生长加快,但各品种水稻的增幅有所不同。

Rice genotypes including Liufu A, Fengyou NO2, Lianjing NO11 grew under different water stress condition and the impact of different forms of nitrogen were observed and analyzed on the changes arising from its seedling. The results showed that： nitrate content of different varieties of rice leaf and root increased with increasing nitrate nitrogen concentration in the nutrient solution. Water stress （10% PEG solution） could significantly increase the contents of leaves and roots of nitrate. Ammonia nitrogen and nitrate have the same anti-trend; certain degree of water stress on root growth was beneficial, due to accelerating the growth of root system, but the increases of all varieties of rice increased differed.