Application Of Biological Organic Compound Fertilizer In Non-pollution Citrus Production

Based on considering about rationally adjusting and supplying effect factors, balancing nutrition elements, harmonizing organic and inorganic nutrients and improving soil microorganism status and soil construct, the author has put forward five treatments of different factors combination better meeting the seasonal need of citrus on environment factors and nutrient elements, and carried through three-year experiment, in order to find better environment factor combination and supply theory base for non-pollution citrus production, the results showed that:1, The fertilization techniques combining organic fertilizer with mineral fertilizer remarkably enhanced the contents of organic matter, total N,P, K and quick-acting N, P, K, especially quick-acting P was obvious, reached over 26.92% than the treatment with mineral fertilizer(CK) in three years, all reached 5% remarkable difference level. If only mineral fertilizer was applied, the contents of nutrition elements decreased, especially that of available P was most obvious. Organic fertilizer, mineral fertilizer , trace element fertilizer effective microorganisms combined with reagent amending soil , the contents of total N, P, K and quick-acting N, P, K were the best in five treatments.2, The application of organic fertilizer increased soil trace element content than the treatment with mineral fertilizer, all reached 5% remarkable difference level. The application of mineral fertilizerdecreased Available B^Zn and increased available Cu accordingly, Fe was not changed, but the application of organic fertilizer and inorganic fertilizer on citrus increased available Fe and Cu obviously. Applying trace element fertilizer could enhance the content of trace element of the soils. Combining organic fertilizer, mineral fertilizer, trace element fertilizer effective microorganisms with reagent amending soil amending soil had better influence on increasing the available form content of soil trace element than treatment with organic fertilizer and inorganic fertilizer with trace element fertilizer effective microorganisms, not reached 5% remarkable difference level.3n Combining organic fertilize with inorganic fertilizer had better influence on improving soil physical character than the treatment with mineral fertilizer, of which soil bulk density was decreased by 0.04-0.10g/cm3 , total porosity, water-holding capacity and aeration porosity increased 10.4%-16.8%, 3.7%-5.6%, 19.9%-30.1% and 7.0%-12.1% respectively, the content of field water were also higher, all reached 5% remarkable difference level. Application of fresh chicken manure on citrus were better than the rotten chicken manure, the results was the soil bulk density and water-holding both reached 5% remarkable difference level. Combining Organic fertilizer, mineral fertilizer , trace element fertilizer effective microorganisms with reagent amending soil was the best on reducing soil bulk density, increasing total and aerationporosity, improving the content of field water and the saturated water content among the five treatments, all reached 5% remarkable difference level.4, combining organic fertilizer with inorganic fertilizer could increase weight of finit, the contents of soluble solid, soluble sugar and VC , remarkably improved finit flavor because of increase of ratio of sugar and acid. After applying mineral fertilizer the fruit was more beautiful than before.5> Combining organic fertilizer, mineral fertilizer , trace element fertilizer effective microorganisms with reagent amending soil increased the height of fruit, leave area and leave thickness of new-formed branch, the experimental results indicated that their photosynthesis was the strongest in five treatment.6> If organic fertilizer was combined with mineral fertilizer, the yields were higher than that of treatment with mineral fertilizer except treatment with fresh pig manure, reached 5% remarkable difference level,, averagely increased 24kg per section , and range from 15.1% to 38.8%, the results showed that influence on treatment with organic fertilizer, mineral fertilizer , trace element fertilizer effective microorganisms and reagent amending soil was the best.