Fertilization Model And Suitable Application Of Aluminum Sulfate By Soda Saline-alkali Paddy Fields

The saline-alkali in west of Jilin province is one of the main distribution area in China. According to the ability for fertility is low,nutrient imbalance,fertilization backward in technology and low utilization for fertilizer by saline-alkali paddy soil of actual situation, design to provide nutrient and not pollute the environment for fertilizer model and suitable application of aluminum sulfate by soil.In this study,the test of soil is severe abandoned the saline-alkali in the north JianBaLa village TaoHao Tai township QianGuo county, vegetation coverage for less than 20%, tested soil for without vegetation and "obvious alkali spot" soil,the soil types of alkaline for meadow.pH value is 10.2, alkalize degrees is 51.32%, organic matter content is 14.72g/kg,physical clay (<0.01mm) content is 40.3%,light clay.The test of ameliorant for Al2 (SO4)3 nH2O.The water from groundwater.8065 early maturity varieties of rice varieties.This set up two experiments by the test of soil:the fertilization model test and suitable application of aluminum sulfate test by soda saline-alkali paddy fields,among them were suitable application of aluminum sulfate test for new open paddy soil. Soda saline-alkali paddy field fertilizer model test was using field plot test,this test using four factors four level sixteen treatments orthogonal test of the plan,four factors of N P K Zn;Four levels of] level means no fertilizer,3 level refers to the local optimal fertilizer,2 levels for 3 level x 0.5,4 level for three level x 1.5. Every plot area for 135m2, randomized to arrange, repeat three times.Suitable application of aluminum sulfate test for total 5 treatments:application of aluminum sulfate for 0 kg/hm2,300 kg/hm2,600kg/hm2,900 kg/hm2,1200 kg/hm2,respectively with G0,G3,G6,G9,G12.Every area for 1 mu, randomized to arrange, repeat three times.Made the following main results and progress from a series of fields and indoor experiment:1,The application for best output fertilizer pureN=176 kg/hm2,P2O5=138 kg/hm2 K2O=51 kg/hm2, ZnSO4=33 kg/hm2.2,The suitable application of aluminum sulfate by soda saline-alkali paddy fields when application of aluminum sulfate is 300 kg/hm2,the rice yield is highest,production of 3880 kg/hm2,yield increased four times than the treatment of unused aluminum sulfate. When application of aluminum sulfate is 600 kg/hm2,900 kg/hm2,1200 kg/hm2 for the rice yield characters and the output without regularity influence but the rice yield more than 200% for unused aluminum sulfate.3,Soil of pH value are different degree of reduced for application of aluminum sulfate ameliorant,soil of pH change is not obvious for blank test.Soil of pH dropped 0.50 unit when application of aluminum sulfate is 300 kg/hm2; Soil of pH dropped 0.65 unit when application of aluminum sulfate is 600 kg/hm2; Soil of pH dropped 0.94 unit when application of aluminum sulfate is 900 kg/hm2; Soil of pH dropped 1.10 unit when application of aluminum sulfate is 1200 kg/hm2;4,When the soda saline-alkali open up the paddy field,humus layer generally increase 7cm..Humus layer is granular and below of humus layer is prismatic for the soil structure.The soil hardness is decrease.The soil samples for main content is fine sand and the content trend to a rapid decrease;but the silt and clay content trend to a rapid increase.The soil of pH value,total of soluble salt,CEC,alkalize degrees is reduce;Organic matter content is increase 30 percent.