论文部分内容阅读
我国北方,尤其是“三北”地区,冬季气候寒冷,早春又多刮旱风,如果育苗没有必要的防寒抗旱措施作保证,会造成不应有的损失。本文介绍几种苗木越冬防寒抗旱方法,供参考。 1.灌水法:早春,苗木常因干旱风的吹袭,而使地上部分失水太多,而苗根又因土壤尚未解冻而不能有效地吸收水分,导致苗木整体水分失衡,出现生理干旱,引起叶、芽枯萎,甚至全株死亡。最有效的预防办法是,在土壤封冻前灌一次透水,即封冻水。 2. 覆土法:幼苗期用疏松的细土覆盖,厚度以超过苗梢5～10厘米为准。有条件的还可在土中
In the northern part of our country, especially in the “Three Norths”, the climate in winter is cold and the wind is more frequent in early spring. If there is no necessary protection against cold and drought in nurseries, it will cause undue losses. This article describes several kinds of seedlings overwintering cold drought resistance methods for reference. 1. Irrigation method: early spring, seedlings often due to the impact of arid wind, leaving the ground part of the water loss too much, and because the soil has not been thawed and can not effectively absorb moisture, resulting in the overall water imbalance in seedlings, physiological drought, Cause leaves, buds withered, or even whole plant died. The most effective way to prevent this is to flood the soil with frozen water once it is frozen. 2. Covering method: Seedling with loose soil cover, the thickness of more than 5 to 10 cm Miao tip shall prevail. Conditions can also be in the soil