利用高冰草在旱地建植大面积绿化的研究

新疆盲目开垦的旱地面积很大 ,生产力水平低 ,弃荒地多 ,水土流失严重。从新疆农垦科学院引进的澳大利亚牧草—高冰草 (Agropyronelongatum)具有耐旱、耐寒、耐盐碱、品质优、青绿期长、产量高等优良特性 ,在降水量 2 50 350mm的山前缓坡旱地种植高冰草 ,建植绿地恢复植被 6 6 .7hm2 。结果表明 :高冰草在该地区能正常完成生育期 ,生育期为 152d、绿期长 2 10d ,分蘖力强、单株分蘖数 110个 ,植株高 10 0～ 16 0cm。营养期粗蛋白含量为 19.14% ,产量高峰期的第 3a干草产量 74 19.0kg/hm2 ,与对照 (蒿属 +羊茅型荒漠草原 )相比 ,提高 2 86 1.7% ,种子产量 150kg/hm2 ,干草适应喂马、牛、羊等家畜 ,为旱地大面积退耕还草建植绿地 ,减少水土流失 ,保护环境起到了前期试验示范作用。

Studies on Establishing Geat Greenbelt on Arid Land Using Agropyron elongatum

Great area of arid land in Xinjiang had been blindly reclaimed which resulted in poor productivity, serious water loss and soil erosion. Agropyron elongatum introduced from Australia was planted in order to resume vegetation at foot of mountain where precipitation is 250~350 mm . Results show that Agropyron elongatum grew well, with 152 ds generation periodand and 210 ds green period. It had stronge tillering ability, average 110 per plant . And it reached 110~160 cm in height . The highest yield, 6594.0 kg/hm2 was got in the third year, which was 2861.7 percent more than the control. Agropyron elongatum planting made a prophetic demonstration on protecing environment, decreasing water loss and soil erosion, resuming green land on arid land.