Study On Competitive Mechanism And Phytocide Of The Scirpus Planiculmis Fr. Schmidt And Cotton

The soil fertilizer residues are the main problems in the agricultural production and the destruction of theecological environment caused by the fertilizer residues. Fertilizer is usually invested in accordance with theexperience affected by the traditional mode of production and unreasonable fertilization habits. This approachallows the fertilizer to the lack of specificity, low efficiency of fertilizer, imbalance nutrient supply, and easypollution of the body of water, atmospheric environment, also affects the high yield and quality of cotton.Accurately grasp the characteristics of field soil space distribution, to determine a reasonable soil nutrientmanagement unit, and adjust the amount of fertilizer inputs is the basis of the Cotton Soil accurate management.In order to achieve management partition of cotton soil nitrate, study the partition management on cottondry matter accumulation, total nitrogen, and the yield of cotton. A comparative study of the partition fertilizationmanagement and field general management to confirm partition fertilization management can increase cotton drymatter accumulation, total nitrogen and cotton production. Cotton Soil nitrate determination confirmed thatpartition fertilization management can reduce the nitrate content of the soil in the study from the four aspects ofthe effect of the partition fertilization management validation studies:1Based on analyzing spatio-temporal variability of soil properties in the study area, Fuzzy c-means clusteringalgorithm was used to delineate management zones. In order to determine the optimum fuzzy control parametersat the study area. Organic matter, total nitrogen, available phosphorus, and salinity were collected from cottonfield in northern Xinjiang Province. In order to determine the optimum fuzzy control parameters, the fuzzinessperformance index (FPI), c-φ combinations and the multiple regression based on external variable were used inthis study. Meanwhile, the cotton yield was chosen as the external variable. The average confusion index waslow in all management zones. Thus, the overlapping of fuzzy classes at points was low and the spatialdistribution of membership grades was unambiguous. To estimate the validity of zoning result, the generalstatistics analysis on the data was carried out. The zoning statistics showed that variation coefficients of soilproperties decreased, while the means of the soil properties differed sharply between management zones. Theseresults indicated the classified management zones can carry out variable input and precise managementdecision-making according to spatial variability of different management units, and to provide basic informationand effective means for precise field management.2Test soil nitrate content in the cotton five growth stages were less than the control area，and showed significantdifference, Description Partition Manager fertilization of the soil nitrate content less than conventionalmanagement; Through the cotton boll stage comparison shows that soil nitrate content, Partition Managerfertilization of cotton boll stage a larger field of soil nitrate content less conventional management, can be seenthat, Partition Manager will help reduce soil residual nitrate.3Study of the fertilization management mode on cotton growth period of dry matter accumulation amount andtotal nitrogen content. Studies have shown that in the partition fertilizer management of cotton dry matteraccumulation were higher than the total conventional management fertilization mode, which partitionfertilization management flowering boll early the boll late, early flocculation period and full boll opening ofcotton dry matter accumulation than conventional fertilization high31.88%,30.07%,34.38%,29.56%and24.52%, and variance analysis, partition management and field general management cotton dry matter accumulationwas significantly different. Monoclonal total dry matter accumulation curve trend. Cotton dry matteraccumulation has been a growing trend in cotton full boll opening growth trend gradually. Cotton total nitrogentrends and dry matter accumulation similar to cotton flowering of the full flower period, cotton body nitrogencontent increased, the maximum accumulation during the full boll opening. Cotton total nitrogen content conventional management partition fertilization management have increased, the maximum increase of32.42%,while the increase in the total nitrogen content of four management and control cotton plants in the region themost significant of32.35%, by analysis of variance, cotton each growth stage partition management and generalmanagement total nitrogen content were significantly different.4Experimental determinations of cotton production area and control area, Shows: Cotton production test areaswere significantly higher than conventional management control area. Daejeon conventional management ofnitrogen fertilizer into greater than partition management, But the pilot area of cotton dry matter accumulation,nitrogen uptake and yield were significantly higher than the control area. Therefore, the amount of nitrogenfertilizer can be significantly increased to some extent, the amount of dry matter accumulation of cotton andcotton plant nitrogen uptake, while increasing the cotton boll number and boll weight to increase cottonproduction. Partition Manager Nitrogen fertilizer production up276.7kg/hm2.Fertilization experiments in the partition area, Cotton yield differences districts significantly less than thecontrol area Daejeon conventional management, Description Partition Manager can be reduced to some extent,the difference between the yields of cotton, Partition fertilization can reduce soil fertility differences based on theyield of cotton.