翅荚木苗期蒸腾耗水特性研究

Characteristics of Water Consumption by Transpiration of Zenia insignis at Seedling Stage

采用盆栽方法,对不同天气和不同土壤水分条件下翅荚木苗木的蒸腾耗水特性进行了研究,结果表明:翅荚木蒸腾耗水速率日变化呈单峰曲线;日耗水速率当年生苗木的大于一年生留床苗的;日最大耗水速率当年生苗木晴天出现在12:00—16:00,阴天出现在12:00—14:00,一年生留床苗晴天出现在10:00—14:00,阴天出现在10:00—12:00;控水条件下,土壤永久萎蔫系数当年生苗木为7.83%,一年生留床苗为5.95%;当土壤含水量低于6.03%时,当年生翅荚木枯死落叶,当土壤含水量为3.32%时,一年生留床苗严重萎蔫、枯黄。

Characteristics of water consumption by transpiration of Zenia insignis at seedling stage were studied by using pot seedling in different weather and water conditions.The results showed that the diurnal variation of water consumption rate by transpiration of Zenia insignis showed single-peak curve. Water consumption rate of the current-year consumption rate of the seedlings current-year seedlings was higher than annual stubble seedlings.The occured at 12：00-16：00 in sunny,but occured at largest water 12：00-14：00 in cloudy.However,the annual stubble seedlings occured at 10：00-14：00 in sunny,occured at 10：00-12：00 in cloudy.Under water controlling,the permanent wilting coefficient of the current-year seedlings was 7.83%,annual stubble seedlings was 5.95% .When soil moisture was less than 6.03% ,the current-year seedlings would die.When it was 3.32%,the annual stubble seedlings would languish permanently, even to die.