堿化鹽土摻砂對土壤理化性狀和玉米生長影響研究.pdf

1、分類號 S156.4 學校代碼 10129U D C 631.4 學 號 2012204016堿化鹽土摻砂對土壤理化性狀和玉米生長影響研究 Effects on Soil Physical-chemical Property and Corn Grow in Alkalized Solonchak Soil by Adding Sand申 請 人：藺亞莉?qū)W科門類: 農(nóng) 學學科專業(yè): 土壤學研究方向：土壤資源利用與改良指導教師：李躍進 教

2、授論文提交日期：二○一五年六月Effects on Soil Physical-chemical Property and Corn Grow in Alkalized Solonchak Soil by Adding SandAbstractIn order to solve the problem that viscous alkalize solonchak soil in Inner MongoliaTumochuan Plai

3、n exit such as soil heavy, poor crop growth, low yield problems, conducteda soil improvement experiment by mixing sand to soil plough layer to improve soilaeration water permeability . Choosing corn as indicating crops t

4、o study the effects ofadding sand on soil physical-chemical properties, crop growth and yield increase, so as toexplore a simple and practical technology for alkalize solonchak soil improvement to adaptto large area prom

5、otion. The results showed that mixing sand to soil plough layer inTumochuan Plain viscous alkalize solonchak field could reduce soil bulk density, changethe soil mechanical composition and soil texture, increase soil aer

6、ation porosity of viscousalkalize solonchak soil, improve soil aeration water permeability, reduce soil soluble saltand alkalization degree, improve the soil enzyme activity, promote the soil nutrient release,effectively

7、 improve growing environment of corn plants and increase the yield of corn.1.The soil bulk density with adding 20% sand decreased from 1.64 g/cm3（CK）to1.49 g/cm3. Soil aeration porosity increased from 8.57% to 18.17% to

8、reach the normalrange, making the soil sand, silt and clay content ratio tend to moderate. Soil texture turnfrom loamy clay to clay loam .Soil hardness was decreased 45%. The maximum waterholding capacity, capillary wate

9、r holding capacity, the minimum capacity increased20.76%, 20.76% and 20.76% respectively.2. After harvesting the crops, the pH value of plough layer decreased to 7.95. Thecontent of soil soluble salt reducing dropped 20.

10、49% to 9.82 g/kg. The alkalization degreewas significantly decreased by 46.10%. Adding sand treatment reduced the content of soilorganic matter and available N, fell by 24.44% and 47.55% respectively. However, addingsand

11、 treatment make a difference in releasing available P and available K, increased by54.52% and 11.22% than control treatment respectively. Adding sand treatment had thegreatest influence on soil enzyme activity of urease,

12、 increased by 62.90% compared withcontrol treatment, The content of hydrogen peroxide enzyme activity is 0.89 ml/ （g·20min),the content of invertase activity was 16.48 mg/(g. 24 h).3.The rate of corn emergence rate