| In order to investigate acetyl hydroxamic acid (AHA) impact on the cold groundyield and quality of maize,2013~2014in the research base Heilongjiang BayiAgricultural University conducted a study of fertilizer ratio. Zheng958test as testmaterials, test processing includes N-free zone (CK1); NPK zone (CK2);conventional fertilizer (N1)+AHA;-30%nitrogen fertilizer (N2)+AHA;-50%nitrogen fertilizer (N3)+AHA, AHA design which three gradients were23kg/hm2(A1),45kg/hm2(A2),68kg/hm2(A3). Through the photosynthetic capacity, yield,cost and quality of maize analysis, screening and nitrogen fertilizer synergist ratio ofthe amount of corn grown in the most appropriate, to provide technical guidance forthe cultivation of maize and fertilizer efficiency. The main findings are as follows:1Nitrogen fertilizer synergist Frigid Corn leaf photosynthetic performance layerUnder the experimental conditions, the different treatment of maize leaves LAI,LAD, Pn in the whole growth period showed a single peak curve, with increasingamount of nitrogen and increase nitrogen levels in the same corn LAI, LAD,photosynthetic rate increased with AHA administration increased amount increases.Most deal with leaf chlorophyll content showed a single peak curve, individualtreatment bimodal curve, filling the late Urea AHA’s SPAD value was significantlyhigher than conventional fertilization area.2Nitrogen fertilizer synergist for Frigid Corn stalks growingCompared with the non-N area, nitrogen fertilizer can reduce corn ear height, plantheight and stem dry matter content increased, there was no significant difference inheight among corn different nitrogen levels, and with the increase in corn nitrogenfertilizer ear height showed a decreasing trend, stem dry matter are showingincreasing trend. Compared with conventional fertilization area, nitrogen fertilizerdifferent gradient AHA had no significant effect on plant height; normal nitrogenlevels can significantly reduce corn added AHA ear height, and significantly higherstem dry matter content, low nitrogen fertilizer levels AHA effect was not apparent.3Nitrogen fertilizer synergist Cold Corn Yield and Nitrogen Use Efficiency Compared with conventional fertilization area, different levels of added nitrogenfertilizer synergist can increase corn ear length, ear diameter, kernels per row, rowsper ear, but for kernel weight, it is only when the normal amount of nitrogen fertilizerAHA for it to improve. Conventional fertilization add AHA, the highest grain yieldand nitrogen use efficiency, low nitrogen levels in the addition of high concentrationsof AHA, its yield and nitrogen utilization rate is still higher than conventionalfertilization. Fertilizer synergist can improve the yield and nitrogen use efficiency ofcorn, based on conventional fertilization fertilizer Application biggest economicpromotion, in30%and50%reduction in nitrogen fertilizer after the maximumamount of nitrogen fertilizer synergist real income is still higher than conventionalfertilization.4Nitrogen fertilizer synergist quality cold ground cornNitrogen fertilizer can significantly increase grain corn starch, protein and fatcontent, and with the reduction in the amount of nitrogen fertilizer decreased. On thebasis of conventional fertilization with nitrogen synergist can improve grain starchand protein content, but the low level of nitrogen fertilizer AHA, enhance the effect isnot obvious; the same level of nitrogen fertilizer different gradient AHA fat had nosignificant effect on the grain.These results suggest that the AHA Hunban directly with urea as the increase maizeyield and fertilizer use efficiency of a technique that measures are entirely feasible.When nitrogen fertilizer synergist, can reduce30percent of nitrogen fertilizer, soensuring the basis on corn yield and economic benefit, not only reduces the cost offertilizer, manure and saving resources, indicating that nitrogen fertilizer on maizeproduction has synergist great application value. |
PDF Full Text Request