Study on the Synthetic Effect and Mechanism of HA Compound Fertilizer Applied in Rape
|School||Agricultural University of Hebei|
|Course||Plant Nutrition and Fertilization|
|Keywords||The HA fertilizer : Rape Yield Quality indicators : physiological indicators Nutrient use|
Resulting in a large number of chemical fertilizer for the vegetable plot long-term soil nutrient imbalance becomes inferior quality of the vegetables, indoor simulated sand culture and soil culture and micro combined method, study new particles HA compound fertilizer nutrient release law on rape yield quality, soil nutrient conversion and utilization. The results showed that: ① crop growth conditions at room temperature 30 to 32 ° C, 2 ~ 8h nutrients such as inorganic fertilizer N, P, K release after fertilization was significantly higher than that of HA compound fertilizer; fertilization treatments with time, both nutrient release showed a downward trend, cultured for 2 to 4 weeks 8h) (K HA compound fertilizer nutrient release significantly higher than that of inorganic fertilizer. The whole culture time, inorganic fertilizer N, P total release of the above HA compound fertilizer K total release of HA compound fertilizer than inorganic fertilizer showed. ② soil culture conditions, all fertilization treatments compared with the control significantly increase yield, tested fertilizer yield difference was not significant, but the general performance of the HA compound fertilizer compared with the corresponding inorganic fertilizer production. In the amount of inputs such as nutrient conditions, humic acid can promote the absorption of the Rape of N, P, K, Zn, Mn, improve recoveries of N, the utilization of P and K; significantly reduce the nitrate content in Rape boost soluble sugar, crude protein content and SOD, POD, NR activity; can effectively improve the rapeseed chlorophyll content, root activity and transpiration intensity, reduce the stomatal resistance, in order to protect the water and a variety of metabolic activities exuberant; HA compound fertilizer in improving rapeseed quality significantly better than inorganic fertilizer, especially in the 4th HA compound fertilizer (HA-NPK-Zn) optimal; the of micro fertilizer amount soil culture test part results consistent. The ③ HA compound fertilizer to stimulate the synthesis of rapeseed absorption of nutrients, water and dry matter, provide the material basis for the production of harvest, rape yield and fertilizer amount was quadratic correlation HA compound fertilizer usage and yield regression equation: y =-2E -05X ~ 2 0.0402X 48.993 (R = 0.889), fertilizer, 1005kg/hm ~ 2 the highest yield of 69.19t/hm ~ 2, the amount of inorganic fertilizer production regression equation: y =-2E-05X ~~ 2 0.0346X 48.585 (R = 0.934), the fertilizer for 865kg/hm ~ 2, the highest yield of 63.55t/hm HA compound fertilizer increased by 8.87% maximum yield more inorganic fertilizer. ④ HA compound fertilizer compared with nutrients such as inorganic fertilizer to increase soil available nitrogen, available P, available K content; same time, improve the soil catalase, alkaline phosphatase activity, reduce soil urease activity and HA effect, soil alkaline phosphatase activity, and available phosphorus content showed a highly significant linear relationship (plus Mn treatment except) the HA compound fertilizer to improve soil respiration, enhance soil microbial activity, accelerate the transformation and utilization of nutrients in the soil.