Research And Analysis On Soil Fertility Of Gongqing Farm In Heilongjiang Province

In order to find out the status of farmland soil fertility in Gongqing Farm of Heilongjiang Province and optimize the existing agricultural production management measures,534 soil samples were collected from 27 stations in Gongqing Farm,Heilongjiang Province,which was based on Gongqing Farm,Heilongjiang Province.pH,organic matter,available N,available P,available K and so on.Using SPSS statistical software for data analysis,the following conclusions:The soil organic matter content was between 10.2 g / kg and 120 g / kg,and the average content of organic matter was 39.6 g / kg.The soil alkaline hydrolysis was the most important factor for the soil pH.The soil pH value of Gongqing farm was between 3.4 and 7.9,with an average of 5.53.The average content of available N in soil was between 5.2 ~ 98.1mg / kg and the average value was 29.4mg / kg.The soil available phosphorus content was between 29 mg / kg and 69 mg / kg.The content of available potassium was between 61 mg / kg and 503 mg / kg,with an average of 201.5 mg / kg.The correlation analysis showed that soil nutrients had significant correlation with soil available potassium and pH value,organic matter,available nitrogen content,soil available phosphorus and pH value,soil available nitrogen and soil organic matter content;Potassium was significantly correlated with available phosphorus content in soil.The correlation between soil alkali-hydrolysable N and organic matter was the strongest correlation among all the parameters.The principal components of soil nutrients were extracted from principal component analysis,the first principal component mainly reflected soil organic matter and alkali-hydrolyzable nitrogen content,the second principal component reflected soil pH value,and the third principal component was soil Available phosphorus and available potassium.The fuzzy comprehensive evaluation method was used to analyze the cultivated land fertility status of Gongqing Farm,and the classification of cultivated land fertility was classified.The results showed that the farmland of Gongqing Farm was in middle and low yield fields.It is suggested to improve the soil fertility through the establishment of reasonable tillage system,soil environment and soil fertility;to improve the soil fertility through the application of organic manure,straw returning or green manure,etc;to improve the low-lying and low-yield land,Dry land and expanding rice area as the direction to enhance agricultural development,the development of various forms of crops.