The Urban Soil Nutrient Status And "3414"Experiment Effect Of Research

At present, the problems of chemical fertilizer in agricultural production has aroused strong concern. With the gradual increase in the amount of chemical fertilizers, the relationship between fertilizer inputs and crop yield has been one of the main research problems in the field of agricultural production, but also need to be urgently addressed in the current agricultural fertilizer. This article on the basis of the analysis in Yucheng District soil nutrient status, the use of "3414" the best design of quadratic regression, field experiment, explore Yucheng District of rice, corn, wheat and other major crops, high-yielding and efficient fertilization and eventually achieve the goal of sustainable agriculture. The study results are as follows:(1) Yucheng District cultivated soil weakly acidic (5.5<pH≤6.5), accounting for98.77%of the total area of cultivated land; region’s soil organic matter content is generally30to40g/kg,91%of the total cultivated area in a relativelya high level; rich region’s soil NPK.(2)"3414" rice field trials show that in Ya’an City, the actual local conditions of soil nutrient, nitrogen rate19.34kg/acre, the amount of phosphorus11.84kg/acre, the amount of potassium1.71kg/acre can get the best yield of377.6kg/acre.Using different amount of nitrogen, phosphate, potash, each have different biological traits of rice effect, the effect on panicle largest, followed by seed setting rate, minimal impact is thousand grain number.(3)"3414" corn field trials show that in Ya’an City, the actual local soil nutrient conditions, the nitrogen rate of18.46kg/mu, the amount of phosphorus16.20kg/mu, and the amount of potassium3.48kg/mu, can be the most good yield of426.0kg/acre.Using different amount of nitrogen, phosphate, potash, the biological traits of maize has different effect, which has the greatest effect in the line of grain number, followed by ear length, the effect is the smallest ear rows.(4)"3414" wheat field trials showed that the Yucheng District local soil nutrient conditions, the nitrogen rate of7.5kg/mu, the amount of phosphorus3.6kg/acre, and the amount of potassium4kg/mu, get the best yield for of332.23kg/mu.Using different amount of nitrogen, phosphate, potash, have different effects on the biological traits of wheat, which had the greatest influence to mu effective panicle number, followed by ear length, the effect is the smallest plant height.