Scientia Silvae Sinicae ›› 1998, Vol. 34 ›› Issue (4): 14-21.
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Keqin Wang,Binrui Wang
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Abstract:
This paper deals comparatively with the runoff-producing, soil-water content, water balance and trees growth of two spacing (9m×2m and 5m×2m) artificial Locust Forest between water-harvesting and conventional treatment. The results showed that afforestation by water-harvesting can increase runoff harvest in the planting strip, raise soil water content, permeate more rain-water into deep soil under the roots range and prevent critical deficit of soil water continuously for a long time——soil desiccation, which results in declination of trees growth. In these treatments, the lowest density (8m2 tamped) is desirable for effect, it is that more than 35% annual runoff yield is stored in soil, deep soil water is replenished effectively and growth of forest tress is promoted.
Key words: Afforestation by water-harvesting, Planting strip, Roots range, Deep soil, Soil desiccaion
Keqin Wang,Binrui Wang. THE INITIAL STUDIES ON AFFORESTATION BY WATER-HARVESTING TO PREVENT SOIL DESICCATION OF ARTIFICIAL PLANTATION[J]. Scientia Silvae Sinicae, 1998, 34(4): 14-21.
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Fig.1
The model of afforestation by water-harvesting"
Table 1
The characteristic of precipitation and water harvested in the planting strip in Aug., 1994"
Fig.2
Soil water movement under various treatments during concenrated precipitation"
Table 2
The change in water storage and infiltrated quantity of soil water in the planting strip under various treatments during concentrated precipitation"
Table 3
Water balance in the planting strip in 4-years-old Locust Forest"
Table 4
The status of trees growing under difference water-harvesting treatment in Locust Forest planted in 1992"
Table 5
The status of trees growing under various density in 9-years-old Locust Forest"
