Effect of Different Improved Measures for Vegetation and Soil Fertility in Saline-alkalied Grassland

Inorder toimprovethe lawnplantsurvival requirement,to thedegeneration, thesalinationlawn carried onthe dif- ferent measure improvement experimental study.Three kind of improvements all improves sloppily the habitat, the increase soil fast-acting nutrient, the increase forage grass accounts for the proportion in the grass group. Fertilizing improvement to cause the leguminosae and the compositae forage grass the proportion increases 19.8%～ 39.9% separately in the grass group comparedtothecontrol farmplot and27.5%～34.4%, causes thegramineaeforage grass proportionto reduce 15.3%～21.3%, may eat the forage grass output to increase 22.0%～ 57.8%. Fencing causes the leguminosae and the compositae forage grass increases13.4%～ 26.7% separately and4.7%～ 9.0%, may eatthe foragegrassoutputtoincrease13.1%～ 78.0%. Shallowly cultivation causes the leguminosaeand the compositae forage grass proportion increases17.7 %～ 27.3% separately, 23.2%～ 36.3%, the gramineae forage grass proportion reduces10.1%～ 12.1%, may eat the forage grass output from decrease 28.5% to increase 28.6%. From this obtains, fertilizing and fencing is effective way of grassland improvement.