Study On Production Effects Of Winter-wheat And Summer-maize Applied Biological-organism Fertilizer For Long-term

The production effects and action mechanism of applied EM biological-organic fertilizer to winter-wheat and summer-maize under the typical cropping systems of the Huabei area in china were analyzed. The results are as follows:EM compost could obviously and steadily promoted winter-wheat and summer-maize yield. The annual average yield of treatment applied EM compost 15000kg/hm2 was 16779.7kg/hm2 and had been keeping at 1000kg/mu for seven years continuously, which was higher than treatments applied the same amount tradition compost, 7500kg/hm2 EM compost and chemical fertilizer by 9.2%, 15.5% and 34.8% respectively; It of treatment applied EM compost 7500kg/hm2 had been keeping at 1000kg/mu for six years continuously too, which was higher than treatments applied the same amount tradition compost, chemical fertilizer and EM soaked seed by 7.2%, 16.7% and 72.3% respectively.Not only the crop yield could be raised, but also the crop quality could be improved effectively applied EM biological-organic fertilizer. The prude protein content of crop seed of treatments applied EM compost was higher than other treatments'. Of which, it of winter-wheat seed of treatments applied EM compost 15000kg/hm2 was higher than treatments applied the same amount tradition compost, 7500kg/hm2 EM compost, chemical fertilizer and EM soaked seed by 5.5%, 4.9%, 10.4% and 19.9% respectively; it of summer-maize seed of treatments applied EM compost 15000kg/hm2 was higher than treatments applied the same amount tradition compost, 7500kg/hm2 EM compost, chemical fertilizer and EM soaked seed by 3.7%, 2.1%, 10.4% and 21.3% respectively too.The main causes resulted in the yield and quality difference among treatments were that it was beneficial to decomposing and releasing nutrients in compost when mixed EM and it was raised significantly for the rapid availability of Nitrogen, Phosphorus and Potassium in soil applied EM biological-organic fertilizer, which increased the Nitrogen, Phosphorus and Potassium nutrient content in stem, leaf blade and ear and improved the organism function, and then the chlorophyll content and rate of photosynthesis of crop functional leaf blade were raised, the strengthened photosynthesis increased the plant dry matter content, thereby laid a foundation for seed-filling.