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Fertilizer plays an important role in agricultural production, but its low utilization efficiency of its series of hazards to the environment, agricultural products bring more and more attention has been paid, therefore, slow / controlled release fertilizer is becoming plant one of the hot issues of nutrition and fertilizer-disciplinary research. The test hazelnuts for the test material, the development of their full growth of domestic demand fertilizer characteristics suitable for its growth and development need special controlled-release fertilizer, the fertilizer each 25 ℃ hydrostatic soaked culture method and soil column leaching method law of the release of nutrients, with ordinary fertilizer and pure release fertilizer contrast, through field trials explored release blend bulk fertilizers on nutrient uptake, soil enzyme activity, hazelnut physiological characteristics and growth indicators of the impact. The main findings are as follows: 1,25 ° C hydrostatic, pure release fertilizer beginning of the 35th day of nitrogen, phosphorus and potassium, the cumulative release rate were 28.5%, 9.31% and 27.43%. Controlled release blend fertilizer 35d release process, the beginning of the nutrient release rate increases rapidly, which in the first day of the release of the highest rates of nitrogen, phosphorus, potassium release rates were 20.16%, 15.57%, 33.3% release rate release rate for the period is basically maintained at less than 2%, to the 35th day of nitrogen, phosphorus and potassium nutrients cumulative release rate of 49.4%, 20.8%, 40.7%. Common compound fertilizer processing eluent pH value of the minimum value in the 70 days sampling, pure CRFs, the lowest pH value of the eluent in 14 days, controlled release blend fertilizer treatment, leaching The lowest value of pH value in the 63 days of sampling. Of pure release fertilizer and controlled release blend fertilizer treatment, eluent EC first continuation over time gradually increased to the highest value is gradually decreased and then increased. Cumulative ordinary fertilizer nitrogen, phosphorus and potassium leaching rate variations, in the first 70 days, the nitrogen cumulative release rate reaches 52.81%, 15.78% higher, respectively, than the pure-release fertilizer and controlled release blend fertilizer 20.08%. Common compound in the first 70 days, Phosphorus cumulative release rate of 43.80% pure release fertilizer phosphorus in the first 70 days cumulative leaching rate of 17.72%, the first 70 days of phosphorus release blend bulk fertilizers accumulated leaching rate of 27.09 %. 70 days in the first 70 days, ordinary fertilizer Potassium cumulative release rate reaches 50.30%, and the pure release fertilizer potassium in the first 70 days cumulative leaching out rate of 28.60%, controlled release blend fertilizer Potassium cumulative leaching rate of 36.7 %. 3, hazelnuts grown four times, compared with ordinary fertilizer, a pure controlled release fertilizer treatment increased leaf net photosynthetic rate increased by 6.9% to 93.3%, the transpiration rate improved by 5.8% to 19.0%, 4.8% in stomatal conductance to 27.1%, stomatal limitation value decreased by 4.8% to 64.5%; controlled release blending fertilizer processing the hazelnut leaf net photosynthetic rate increased by 9.9% to 94.7%, transpiration rate increased by 8.1% to 23.9%, and 4.3% of stomatal conductance to stomatal limitation value decreased 29.4%, from 9.3% to 62.8%. 4, pure-release fertilizer or controlled release blending fertilizer processing soil available nitrogen, phosphorus and potassium content than ordinary fertilizer processing. On soil enzyme activity, the ordinary fertilizer processing fertilization pre to maintain soil nutrient content at a high level and the activity of the nutrient content decreased gradually after causing hazelnut the maternity late Tuofei; pure CRFs can make The whole growth period of soil the fattened water average at a high level; controlled release blend fertilizer treatment, both to make the whole growth period of soil the fattened water average at a high level and can effectively reduce fertilization costs. In addition, pure-release fertilizer and controlled release blend fertilizer treatment compared with the ordinary fertilizer processing plant NPK content higher 20% -30%. Control with no fertilizer, the fertilization treatment hazelnut leaf length, leaf width, plant height and stem diameter were increased, including leaf length increased 0.93 ~ was 1.30cm, leaf width increased 0.63 ~ 0.83cm, plant height increased 29.7 ~ 45.4cm, stem diameter increased 0.63 ~ 0.93cm. Compared with ordinary fertilizer, pure release fertilizer and controlled release blend fertilizer treatment growth the hazelnut leaf leaf length and leaf width is not obvious, the difference was not significant; hazelnut plant height and stem diameter impact significantly, including plant height increased by 9.3cm , 15.7cm, stem diameter increased by 0.24cm, 0.30cm.
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