Effect Of Biological Organic Fertilizer On Growth Of The Winter Wheat Under The Regulated Deficit Irrigation

The experiment was carried out with two wheat varieties at theexperimental farm of Resources and Environment College in ShandongAgricultural University from 2003 to 2004. The effect of three types ofRegulated Deficit Irrigation and two different fertilizers on growth anddevelopment, yield and its componet, flag leave′s physiological property ,grain quality was studied, simultaneously, the effect of different treatments onthe soil environment was primarily studied. The result were as follows:1.when the supply of waters is good, it is no different between of the twofertilizers in organ biomass and uptake by wheat. Using organic fertilizers, thewheat?s root activity was higher than using NPK. At the little supplies of water,using organic fertilizers was better than using NPK. After rewatering, thoughthe wheat using organic fertilizers decrease in the three indexs, there washigher than using NPK fertilizers .so the organic fertilizers can raise the extentof regulated deficit irrigation.2.Photosynthetic rate,Transpiration rate,Root vigour and LAI all havevarious levels stimulation. The heavier is the water stress, the stronger is thestimulation. Using biological organic Fertilizer effectively strengthen thestimulation, and promote the wheat growing normally on later stage. It alsohas had good effect on drought-resistance for winter wheat under aridcondition.3. we can watch the later effect From appling fertilizer and RegulatedDeficit Irrigation, in seedling stage under slight Regulated Deficit Irrigationand appling organic fertilizers, can increase the output of the wheat . as a result,deal 3 is more than deal 1 at the output of the wheat , lumai21 increase1472.6kg·ha-1 ;lumai7 increase 7604.98 kg·ha-1; In seedling stage under seriousdegrees of Regulated Deficit Irrigation ,it can not increase the output of thewheat .but its output is higher than output of NPK . it prove that moisturefactor is primary factor that wheat grow, appling organic fertilizers canalleviate moisture coerce , improve the output of the wheat. Two reason of the improving of yield can be reached from the experiment.First, the population of the whole growth stage is improved and spikes per muis significantly enhanced. Second, photosynthetic potential which lead to highgrain weight was significantly improved from flaging stage to maturing stage.The analysis of physiological and biochemical index shows: The CAT activityis enhanced and the ascending time of MDA content is delayed because we usebiological organic Fertilizer . We can conclude that appling organic fertilizerscan alleviate moisture coerce , help later growth and development of thewheat , improve the output of the wheat. 5.Biological organic Fertilizer can moderate the water, fertility, air and heatin the soil,ameliorate the soil ecological environment. The application ofbiological organic Fertilizer could optimize the soil microflora, increase thepopulation of microbes,for example Silicatebacteria,Phosphobacteria, comeinto being the rational structure,and strengthen soil enzyme activity, Moreover,it can produce many kinds of biological active substance. it also activate soilnutrient, increase release of the slow nutrient, improve phosphorus andpotassium,promote the growth of the wheat. 6.Biological organic Fertilizer is a full-nutrient fertilizer which can bereleased steadily, and its effect last long, its biological activity is high.Moreover, it do no harm to environment. On the contrary, chemical fertilizerhas high contents of rapidly available nutrient and its effect is quick andcontrollable. So, the appropriate combining application of biological organicFertilizer and chemical fertilizer can prompt the efficiency each other, balance...