Studies On Fertility Status In Major Types Of Paddy Soil And Effects Of XIANGZHU Specific Formula Fertilizer For Rice Crop In Hunan Province

This paper studied the fertility status of the major type of paddy soil in Hunan Province through field investigating and sampling, laboratory analysis and computer technology。By taking pH,organic matter, total N,P,K, available N,P,K,Si,Zn, slowly available K as the assessment indices, the fertility quality of the tested paddy soils was evaluated; By field experiment, effects of XIANGZHU specific formula fertilizer for rice crop on early rice and late rice crops and soil were studied, which was manufactured by XIANGZHU Chemical industry limited.company compared with to Single-general of fertilizer and "YANGFENG" compound fertilizer with higher nutrient concentration in the above eight kinds of paddy soil conditions. The main results were as follows:1.The fertility quality of 8 paddy bases could be generally summarized as, soil pH is nearly acidity; organic matter content was medium on; the total N,P were not rich, available P,K,Si,Zn content were low, but total K and available N content was high. The results of evaluating on the soil fertility quality ba use of the fuzzy comprehensive assessment showed: the soil fertility quality of Qiyang purple belonging to the 2 grade of the higher fertility; Ningxiang river slag,slag field of Qidong,hemp slag of Liling,the lime mud field of red clay of Ningxiang,purple ink paste field of Xiangtan and purple moist putty of Nanxian soil fertility quality belonging to the 3 grade and the middle level . Clay field of Zhuzhou belongs to the 4 grade of the lower fertility.2.It can be seen from the early rice experiment that the alkaline hydrolysis N's value of profit and loss of eight different soil parent material rice which are provided to test is "XIANGZHU" specific formula fertilizer for rice crop treatment > "YANGFENG" compound fertilizer with higher nutrient treatment > non-fertilized treatment > straight fertilizer treatment, the efficient P's average value of profit and loss is "XIANGZHU" specific formula fertilizer for rice crop treatment > "YANGFENG" compound fertilizer with higher nutrient treatment > straight fertilizer treatment > non-fertilized treatment, the rapidly available K's average value of profit and loss is non-fertilized treatment > straight fertilizer treatment > "XIANGZHU" specific formula fertilizer for rice crop treatment > "YANGFENG" compound fertilizer with higher nutrient treatment. The amount of alkaline hydrolysis N, efficient P nutrient of the gaining soil which is used "XIANGZHU" specific formula fertilizer for rice crop treatment are both higher than other treatments, therefore, put the "XIANGZHU" specific formula fertilizer for rice crop treatment onto late rice is helpful for the accumulation of the efficient nutrient in soil. The fertilizer usage of rice N, P, K all is "XIANGZHU" specific formula fertilizer for rice crop treatment > "YANGFENG" compound fertilizer with higher nutrient treatment > straight fertilizer treatment.3.It can be seen from the early rice experiment that the alkaline hydrolysis N's value of profit and loss of eight different soil parent material rice which are provided to test is "Yang Feng" brand compound fertilizer treatment > straight fertilizer treatment > non-fertilized treatment > "Xiang Zhu" brand rice special fertilizer treatment, the efficient P's average value of profit and loss is "Yang Feng" brand compound fertilizer treatment > straight fertilizer treatment > "Xiang Zhu" brand rice special fertilizer treatment > non-fertilized treatment, the rapidly available K's average value of profit and loss is straight fertilizer treatment > "Yang Feng" brand compound fertilizer treatment > non-fertilized treatment > "Xiang Zhu" brand rice special fertilizer treatment. After gaining "Xiang Zhu" brand rice special fertilizer treatment, the amount of soil rapidly available N,K nutrient is lower than other treatments, the rapidly available P is only higher than non-fertilized treatment, therefore, early rice "Xiang Zhu" brand rice special fertilizer treatment is helpful for the vegetation to absorb the nutrient in soil. The different treatment for the rice nutrient absorption is "Xiang Zhu" brand rice special fertilizer treatment > "Yang Feng" brand compound fertilizer treatment > straight fertilizer treatment>non-fertilized treatment; the fertilizer usage of different soil parent material N,K is "Xiang Zhu" brand rice special fertilizer treatment > "Yang Feng" brand compound fertilizer treatment > straight fertilizer treatment. The fertilizer usage of P is "Yang Feng" brand compound fertilizer treatment > "Xiang Zhu" brand rice special fertilizer treatment > straight fertilizer treatment.