The Evaluation Of Arable Land Fertility And Its Application In Jingzhou Area

Jingzhou area of the second soil census, in the1980s, basically found out distribution of soilresources and soil types, physical and chemical properties and fertility conditions and land use status;Since the20th century, when the application of3s technology in various fields, the soil quality, thefoundation of the cultivated land production potential of the quantitative evaluation on cultivated landprotection and construction, improvement and utilization of agricultural production has importantpractical significance, especially the production potential of crops, soil obstacle factors, minimumnutrient limiting factors, administrative villages and partition application guidance service patterns ofnew rural economy subjects become jingzhou area needs to solve the problem.In this paper with the second soil census data and jingzhou area of cultivated land use status in2004as the foundation, combined with2006~2012soil testing formula fertilization soil nutrient dataof field investigation to obtain a total of8332sample points, analyses the farmland productivity level,production potential and soil fertility status, and primarily established jingzhou area farmlandproductivity evaluation index system and index system of different crop fertilization; Illustrate themiddle-and-low-yielding fields of different types and cultivated land resources utilization partition andits improvement measures; Creates a picture is a table in one village "fertilization guidance mode. Mainconclusions are as follows:1, jingzhou area of cultivated land resources, land18807.3hectares, accounting for35.9%of thetotal area, producing potential is greater than0.8320, second-class land23105hectares, accounting for44.1%of the total area, the production potential of0.6770~0.8320, the third class10515.7hectares,accounting for20.0%of the total area, production potential is less than0.6770.Average levels, jingzhou area main soil nutrients, soil total nitrogen, available potassium, boron islack of effectively, average content of organic matter, available phosphorus and other nutrientsrelatively rich or moderate. Soil organic matter content less than20.00g/㎏arable land accounted for1.8%of the cultivated land area. Soil total nitrogen content of less than1.50g/㎏arable land accountsfor11.12%of the cultivated land area. Soil available p content below15.64mg/㎏arable land accountsfor0.11%of the cultivated land area. Soil available k content is lower than100.0mg/㎏arable landaccounts for69.18%of the cultivated land area. Soil effective boron content below0.50mg/㎏arableland accounts for87.47%of the cultivated land area. Soil effective zinc below0.80mg/㎏arable landaccounts for26.25%of the cultivated land area. Farmland soil effective molybdenum, copper, iron,manganese content level basically all appropriate and rich.3, low production in jingzhou area of cultivated land area of26685.8hectares, accounting for50.9%of the arable land. Drought irrigation type the middle-and-low-yielding fields covers an area of10674.4hectares, accounting for20.35%of the arable land. Gley type stain elimination and themiddle-and-low-yielding fields covers an area of6404.6hectares, accounting for12.2%of the arableland. Disorder of hierarchical middle-and-low-yielding covers an area of1601.1hectares, accounting for3.05%of the arable land. The middle-and-low-yielding fields or poor fertilizer type covers an areaof8005.7hectares, accounting for15.27%of the arable land.4, jingzhou area of cultivated land fertility evaluation index system. Selected nutrient status,physical and chemical character, section properties, site conditions, soil management, five layers,including organic matter, available p, available k, available si, effective zinc, texture, pH and CEC,profile structure, diving deep, the types of barrier layer, soil parent material, landscape irrigation,drainage capability, reliability and so on15indicators, established the evaluation index system ofjingzhou area farmland productivity.5,"a picture is a table in one village" fertilization guidance mode. In jingzhou area, on the basis ofindex system of different crop fertilization in li village farmland productivity assessment field village asan example, the four big rice and cotton oil crop fertilizer applied research division, division of highhigh high, high, high level, high school, high school, including, in the high level, high and low, high andlow in the low, medium, low low of27high fertilization guide area.