不同田间灌溉处理对长白落叶松苗木生长影响研究

Effect of Irrigation Amount on the Growth of Larix olgensis seedlings

为寻找长白落叶松苗木节水培育技术,研究不同田间灌溉水量对苗木生长影响,于2007年至2009年在吉林东部地区以常规灌溉水量为对照,对田间常规长白落叶松幼苗进行不同灌溉水量处理。结果表明:较高的土壤含水量促进幼苗高生长、地上和地下干物质积累量显著性较高,根系活力相对较强;较高土壤含水量不利于幼苗主根长度生长,苗木抵抗不良环境的抗性物质含量增多或增强。在比常规灌溉次数减少1/3的条件下,幼苗各项生长指标相对较优。

Effects of irrigation amount on the growth Larix olgensis seedlings were investigated in field during 2007-2009.The results showed that the growth and matter accumulation quantity of the seedlings in the soil with more water content were notably higher than those with less water content.The roots were more vigorous also in the former.Soils with higher water content were not favorable to the growth of root lengths,substances to resist unfavorable environment increased in the seedlings.The growth indices of the seedlings were better under the one third reduction of irrigation times compared to normal ones.