太原地区果树林地的土壤干层

通过对太原市窑头村和柏板村人工苹果树、枣树、梨树以及桃树林地土壤含水量的测定,研究了果树林地地表以下0 cm-700 cm土壤含水量的变化和土壤干层分布特点.研究表明,太原市果树林地200 cm-400 cm土层干化现象比较普遍.同一树种,树龄越大,干层发育越强.同时,地形是形成干化的重要因素之一,梁峁地比平川地干化严重.太原地区降水量较小,重力水带分布范围小,深度浅,不能及时补充被消耗的深层土壤水分,这是果树林地易发生土壤干化的主要原因.虽然枣树比梨树、苹果、桃树林耐干旱,但从梨树、苹果、桃树林地干化均不严重分析,在该区发展这四种果树都是可行的.

The Dry Layer of Soil Under Fruit Trees in Taiyuan Region

Through the menstruation of soil moisture content under the apple,jujube, pear and peach trees in yaotou and Baiban villeges of Taiyuan,we studied the variation of soil moisture content between zero and 700 cm,as well as the characteristic and distribution of dried soil layer. The research indicated that,the phenomenon of soil dryness in the fruit trees of Taiyuan between 200 cm and 400 cm is quite common. Among the same kind trees,the older the dried soil layer is severer. Meanwhile,terrain is an important factor to the dryness. The dryness of hilltop is more severe than the plain. Limited preeipitatioh in the Taiyuan area leads the gravity water can not seep deep ,and the amount is little,so it can not supply the need timely. This is the main reason to the dry soil layer of the fruit trees. Although jujube is more dry-resistant than other trees ,but the dry condition is not very serious, so the four kinds of trees can be planted in Taiyuan region.