| At present, the research of producing (super)high yield maize and solving problems of lodging by usingchemical controlling technology to change crops growth characteristics and regulating maize growth is veryactive in a certain range.In this paper,we select DE aiu1as the experimental material Maize were sprayed"MiGao" at the leaf age of9,11,13, and15,ande the concentration of "MiGao" was200g/mu, meanwhile,spraying clear water was setted as control group.The results are as follows:1. Maize of lodging-resistance was increased by spraying"MiGao"The length of stalks internode decreased by spraying "MiGao", the stem diameter increased, and plantheight. reduced by2.91%～24.50%., ear position become more lower,and reduction by1.23%～30.64%. Thecontent of hemicellulose rised by8.50%～20.34%,the content of fiber boomed16.35%～33.51%,and thecontent of lignin surged up69.29%～100.24%.In general,the change of the above characters improved themaize′s lodging-resistance performance.2. The leave area of whole plant was enlargedCompared with the control, the leaf area of maize plant was enlarged by10.17%～27.66%after spraying"MiGao",while the leaf area of average plant ranged8.68from10.06. and leaf area index was increased by10.17%～27.66%,. it improved the utilization rate of light energy.3. The number of roots increased sharply after treating with "MiGao". Compared with the control,thenumber of roots rised by9.79%～26.81%, respectively,the number of aerial root went up8.75%～17.24%.4. The angle between the stem and leaf declined after spraying "MiGao",and reduced by5.59%～24.57%comparing with control group.5. Various physiological indexes were improvedThe content of soluble sugar in leaves decreased at earlier stage by treating with "MiGao"; and it wasimproved by23.57%～30.26%in leaves; at the filling stage, the soluble sugar content in stem reduced by21.32%～42.68%comparing with the control. In the growth period,"MiGao"enhanced the activity of carbonand nitrogen key enzyme in maize, and the activity of nitrate reductase rised by34.71%～40.60%.Thisimproved the nitrogen content in leaves and promoted. The nitrogen content increased by12.07%～21.80%;phosphorus content promoted by21.17%～42.68%and potassium content boosted by9.77%～45.23%,all ofthis could improved the photosynthesis and the metabolism of carbon and nitrogen. At the filling stage, thechlorophyll content in the leaves increased by9.13%~12.86%after spraying "MiGao", so the function of theleaf, would be prolonged.the content of the peroxidase in stem increased by25.00%~57.29%,compareingwith the control.6. The yield of maize improved by treatment with "MiGao"The spike length increased t by10.73%～18.54%and reduced the ear diameter. by0.95%～2.38%afterspraying "MiGao". the number of ear line rised by0.71%～2.38%,with the grain number per line by9.10%～11.85%and grains per ear by11.26%～16.69%.spraying with "MiGao", ear number of ear wasmore than the control and increased by1.17％～3.37％. hundred kernelweight were greater,and comparedwith the control, boosted by3.03%～7.54%.The yield of maize increased singlyficantly by0.81%～25.52%.7. After spraying "MiGao",the length of corn fruit bald point reduced, by7.54%～36.74%comparing with the control,The treatment with "MiGao" reduced the content of water in kernel, and declinede by1.36%～3.40%."MiGao" has effects on lodging resistance, promoting the nutrient absorption and increasing yields ofmaize.Migao has prominent economic benefit in agricultural production, and it can be popularized to largearea. |
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