The Experiment Research Of Improve Alkaline Soil Which Is In Inner Mongolia Agricultural University's Hailiu Park-area

Inner Mongolia Agricultural University's Hailiu Park-area sits in the northern of Tu-mo-chuan plain which belongs to semi-arid area, where distributed a large acreage of saline-alkaline soil.It is out of use in farming,forestry and animal over a long period of time.To transform it into scientific research land, our university decides to improve it.This experiment research with incompletely Latinization design,adopting field experiment and pot experiment,systematic research effect of gypsum and yanjianfeng on physical,chemical properties of alkaline soil which is in Inner Mongolia Agricultural University's Hailiu Park-area , appearance index and the biological output of clover which is experimental plant,and do some synthesize evaluation to the last result of the two ameliorant,thus the feat ameliorant and its most suitable dosage is obtained of improving Park-area's alkaline soil. The main result are as follows:1,After using the ameliorant—Gypsum, soil's physical and chemical properties acquire improvement apparently,main performs in: reduce the soil's pH,from 9.4 of pre-improve to 8.2;change the salt-composition of soil which is water-soluble,the ion of CO32-,HCO3- decreased apparently, SO42-,Ca2+,Na+ acquires increase; reduce the soil's alkalinity,from 30% of pre-improve to 5～10%; the soil's hardness acquires decline apparently,the soil permeability's enhancement reaches to 3～8 times; make the experimental plant—clover germinate and grow normally.2,After using the ameliorant—yanjianfeng,regardless its dosage,the soil's physical and chemical properties haven't acquire improvement: the soil's pH still exceeds 9.5, the soil's alkalinity more than 30% yet, total salt's quantity less than 5.0 g/kg, soil's physical property represents miriness when wet, but stiffness when dry, soil's colour and luster is hoariness, the experimental plant—clover's germination rate is zero.3,According to the result of improvement,it is more suitable with gypsum than yanjianfeng to improve park-area's alkaline soil,synthetic considering the changes of the soil's physical and chemical properties and experimental plant—clover's appearance index and biological output, acquires the most suitable dosage of improve park-area's alkaline soil with gypsum, which is 1.5 Kg. This can offer some theoretical basis and practical experience for our university to improve park-area's alkaline soil completely.