Study On Extension Pattern Of Balanced Fertilization In Tianjin

There are decisive roles of chemical fertilizer in the agricultural production in China. So, there is very important significance of balanced fertilization and scientific fertilization to the sustainable development of China agriculture.Taking the research achievements of dynamic balanced fertilization formula of winter-wheat and summer-corn as the background and extension target, through the extension practices for several continuous years, the present patterns of balanced fertilization extension in Tianjin are summarized. Also, the benefits and extension prospective of balanced fertilization, the technical characteristics of balanced fertilization, the advantages and disadvantages in the extension process are studied. Based on those, the six extension patterns are analyzed deeply. The results are as bellows. In the numerous extension patterns, the government leading extension pattern is the strongest, quicker, and the extension area is larger, but the extension system should be further strengthened, and the policy supports should be given by the government. The extension pattern with the research institutes as the main body is strict and scientific, and is welcomed by the peasants, but the extension strength is weak. The extension pattern with the companies as the main body has the advantage in the extension area, and is a new pattern, but the service consciousness of the agricultural fertilization should be strengthened. The extension pattern with the supply and marketing cooperative as the main body has the advantage of retailing fertilizers, but the technical training to the vocational staff should be strengthened. In the extension pattern with the chain radiation as the main body, the activity of the peasants is higher. So, the extension pattern with the research institute+company+extension+peasant as the main body has the advantages both in extension area and the activity of the peasants, and also can combine the benefits of the several units and learn from others' strong points to offset one's own weakness to promote the development of balanced fertilization together. It also shows that the complex extension pattern of the research institute+company+extension+peasant is the suitable pattern of balanced fertilization extension.Through the analysis and the research, several suggestions on the development of balanced fertilization are put forward in order to provide the theoretical basis and practical guidance for the development of balanced fertilization.