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以木枣为试材进行枣树蒸腾作用与萎蔫现象研究 ,结果表明 :晋西北黄土丘陵旱坡地枣树叶片在正常年份内的蒸腾速率为 0 .93 μg/ (s· cm2 ) ;枣树的蒸腾系数为3 81 .66,即枣树叶片每制造 1 g干物质需要消耗水分 3 81 .66g。枣树的萎蔫现象是指果实的萎蔫和叶片的萎蔫 ,枣树幼树叶片的永久萎蔫系数为 3 .5%,而枣树大树叶片的永久萎蔫系数应低于 3 .3 6%。果实萎蔫分为暂时萎蔫和永久萎蔫。果实萎蔫时期一般是在气温最高的 7月— 8月份 ,特殊年份可持续至 9月上旬 ,枣果实开始萎蔫时的土壤水分含量在 6%左右。
The results showed that the transpiration rate of jujube leaves in the dry land of loess hilly region in Northwest Shanxi was 0.93 μg / (s · cm2) in normal years. The jujube tree jujube The transpiration coefficient is 3 81.66, which means the jujube leaves need to consume 3 81 .66 g water per 1 g dry matter. Jujube wilting phenomenon refers to the wilting of the fruit and the wilting of the leaves. The permanent wilting coefficient of young jujube leaves is 3.5%, while the permanent wilting coefficient of jujube tree leaves should be lower than 3.36%. Fruit wilting is divided into temporary wilting and permanent wilting. Fruit wilting period is generally the highest temperature in July-August, the special year sustainable to early September, jujube fruit wilting soil moisture content of about 6%.