Richly Cultivated Land Nutrient Lack Degree Analysis And Wheat-maize Rotation Planting The Suitability For Gao Ling County

Farmland is the most basic resources of agricultural production, farmland productivity a direct influence on the development of agricultural production. With the rapid development of our country's economy and society, and cultivated land area and quality change on food security, constitutes a serious challenge by the social from all walks of life growing concern. Wheat and corn is GAO LING county two important food crops, the planting area is larger, has a long history. But because conditions of arable land and agricultural measure different, wheat and corn suitability degree also show much difference. For the more reasonable exploitation and utilization of local scarce cultivated land resources, maintaining and enhancing the cultivated land productivity. Based on the project's survey results of "soil testing and fertilizer" and analysis of the GAO LING county's soil organic matter and N, P, K nutrient, on the basis of the status quo of wheat-maize rotation system available nutrient abundant compared Lack of degrees. Simultaneous, quantitative evaluation and classification of different classes was made using "county of cultivated land resource management information system" for county wheat (corn) planting suitability with nine evaluation indexes, and cultivated land related countermeasures are put forward. Results show that: Organic matter 16.79 g/kg average content, total nitrogen content for average 1.08 g/kg, effective phosphorus content of 28.08 mg/average kg, speed phosphorus content of potassium the county-wide average 171.86 mg/kg In the soil of GAO LING county. Relative wheat and corn is concerned, effective phosphorus and rapidly-available potassium is no lack in the soil. But alkali-hydro nitrogen content in deficiency state. GAO LING county's farmland wheat planting suitability can be divided into 3 grade which is highly appropriate, as appropriate, barely suitable. One of the highly appropriate wheat farms has accounted for 154.17 km2 with 90.95% of all cropland , appropriate 13.4 attempts, the total area of arable accounted for 7.9%, both to account for 98.85% of arable land area of cultivated land, is subject; But barely suitable planting farmland wheat 1.93 km2, accounting for only 1.15 % of the total area. For highly appropriate to protect arable land, high yield, ensure its fertility don't reduce circumstances reasonable use of chemical fertilizer usage, scientific adjustment to prevent land aging; and investment than mere Suitable for and reluctance to widely cultivated land, was organic fertilizers, soil fertility buildup, improve alkali-hydro nitrogen content, improving soil nutrient structure, increase financial, material and technology investment, overcome land limiting factor. To force the suitable cultivated land, organic fertilizer, to improve soil the fat to subsoil, reducing soil erosion, the ability to implement straw counters-field, proper crop rotation, improve soil texture and structure, raise wheat planting suitability. Further ascertained the quality of cultivated land and strengthen the protection of arable, guide agricultural structure adjustment, promote advantage agricultural production to advantage area concentrated, ensure that limited arable land resource sustainable utilization.