不同水分条件对主要固沙植物成株生长的影响

Effects of Soil Water Content on the Growth of Dominant Sand-binders

通过对人工林中的梭梭柴、白梭梭和头状沙拐枣成株的土壤贮水量、生长状况和体内水分平衡状况的测定,得知植物的生长状况随着蒸散量的减少而不良。由于灌溉地的蒸散量太大,人工林的密度也过大,试验表明,灌溉维持的年限不长,人工林如不隔年补水灌溉,其生长状况不良。

Growth status, water balance and soil water content of dominant sand-binders, e. g,Haloxylon ammondendron, H. persicum and Calligonum caput-medusae, etc. in planted forest were studied in this paper. The results showed the growth status of these plants became deteroirated with soil water content decrease due to great density of planted forest and significant evapotranspiration, as a result, favorable soil water content couldn't last a few years. If planted forest wasn't irrigated every 2 years,its growth status was still depressed.