Experimental Study Of Suitable Fertilization Measurements On Sunflower In Hetao Irrigation District Of Inner Mongolia

In order to get suitable fertilization measurements of sunflower, field experiments were carried out in Hetao irrigation area of Inner Mongolia. The results show that:Through the analysis of the sunflower trial production and production rate, under different fertilization measures, hole is better than that of broadcasting, and hole applying optimal sunflower under the two measures most productive, broadcasting a minimum processing production, the whole hole applying fertilizer use efficiency is greater than the broadcast, in basal n application rate, smaller after adding potash, den can increase crop yield, visible with right amount into the potash fertilizer can promote crops on the absorption of nitrogen, can effectively improve the utilization efficiency of fertilizer, crop production.Between different fertilization measures cultivator, leaching water analysis, three days after test by monohydrate, monohydrate after seven days, two water irrigation time is different, all three days after comparing broadcasting, den under the TN, TP, NO3--N, NH4+-N content change rule, in dealing with the habits, broadcasting is greater than the hole;Optimal one, no obvious regularity in processing;The superior in dealing with the second point is greater than the broadcast.Under different fertilization measures soil NO3--N accumulation amount in the research and analysis, test by studying nitrate cumulant variation analysis shows that hole applying optimal processing is better than two other measures, minimum pollution to the environment;And change law with time over the total nitrate accumulation analysis shows that the soil NO3--N cumulative range growth trend, broadcasting a NO3--N accumulation amount is too large, the environmental pollution is heavier, in contrast, hole applying optimal two deal with minimum pollution to the environment, and the highest yield, therefore, hole applying optimal second best.In conclusion it, in the way of digging, the based fertiler amount of N、P2C、K2O is:56.25kg/hm、180kg/hm2、105kg/hm,the best fertilization measurement is the first top dressing amount of Nitrate is78.75kg/hm2,while the second is90kg/hm2. The worst measurement is costumed fertilization. So the second superior is the optimal fertilization.