新疆昭苏草原围栏封育效果研究

Effects of fencing closure on grassland reservation in the Zhaosu pasture of Xinjiang

从2004～2005年对新疆昭苏草原76团场天然草地围栏内、外植被特征进行了调查,结果产量增表明：从2003年封育到2004年,围栏封育处理与对照相比草层高度增加36.5%,总盖度增加12.5%,鲜草加56.2%;从2003年封育到2005年,围栏封育处理与对照相比草层高度增加138.5%,总盖度增加54.3%,鲜草产量增加109.1%.在围栏内0～5 cm土层,土壤水分含量较对照增加63.6%,氨态氮含量增加26.7%;在10～20 cm土层,土壤水分含量较对照增加85.1%,由此可见,围栏对草场恢复效果明显.

A series of survey relative to the vegetation characteristics of fenced natural grassland were carried out in the farm 76 located in the Zhaosu Pasture of Xinjiang during two years from 2004 to 2005, tending to reveal the effects of fencing closure on grassland reservation. The results showed that the grass canopy height,total cover degree and fresh herbage yield under fencing closure treatment during the two years from 2003 to 2004 increased by average of 36.5%, 12.5% and 56.2% respectively more than the control;and the three indexes during the years from 2003 to 2005 increased by average of 138.5% ,54.3%and 109.1% respectively more than control;in addition, soil moisture and ammonia nitrogen content of soil layer from 0 to 5 cm depth increased by 63.6% ,26.7% respectively,and soil moisture of soil layer from 10 cm to 20 cm depth increased by 85.1%. That proved grassland reservation by fencing closure had brought about significant effectiveness.