Screening Of Suitable For Mechanical Harvesting Maize Hybrids(Varieties) And The Analysis Of Affecting Correlation Factors Of Dry-down In Kernel Affer Physiological Maturity

This study screening of suitable for mechanical harvesting Maize Hybrids(Varieties) in 2014 and the analysis of affecting Correlation factors of dry-down in kernel affer physiological maturity in 2015 conducted research. objective to filter out the suitable of mechanical harvesting Maize Hybrids(Varieties) and to explore the correlation between moisture content of Maize affer physiological maturity, screening of suitable for mechanical harvesting, high-yield, low grain moisture harvest and post-dehydration rate of Maize Varieties for breeders provide theoretical reference. The research results are as follows:1. screening of suitable for mechanical harvesting Maize Hybrids(Varieties) (1) Analysis showed 120 cultivars (combinations) of materials, the initial screening out after grain physiological maturity corn machine income reached a standard grain varieties (combination) 22, respectively, they are:253×261,93×201,5×37,919 Feng Yu Hua Yu 90133 Limin, Fengle 504, Feng-yu 288, YE22, DK517, MC812, ANTZ2, Feng-yu 906, in Section 8, places 1402, HW684, HW681, Dan 8327, Den 618, Dan 8285, Feng-yu 306, and the United States No.1.(2) Analysis showed 53 cultivars (combinations) of materials, according to CURVES machine income Grain Standards Ministry of Agriculture, in line with high-yield, low water content, low broken characters and better overall performance of single varieties Wei 6000, Niimi 600, Feng-yu 906, Di-ka 517, Yu-dan 9953.(3) In 23 maize varieties, the yield of more than Zhengdan 958, grain moisture content is lower than that of the Qiao-yu 8 and the growth period earlier than Zhengdan 958 varieties has two, namely:Feng-yu 824, Feng-yu 054.2. the analysis of affecting factors of dry-down in kernel affer physiological maturity(1) Analysis of variance showed that the effect of different factors corn hybrids between (mature grain moisture content, maturity grain moisture content drop, grain dehydration rate, grain main chemical composition, grain grain type) have reached significant or highly significant. In breeding, the above traits maize varieties can be selected.(2) the correlation analysis, the average grain dehydration rate and maturity grain moisture content had significant negative correlation mature grain moisture content and before the mid-dry-down rate was negatively correlated with the late dry-down rate was significantly negatively,correlated.Description:Low grain moisture corn harvest varieties, post-dehydration faster rate.(3) Correlation analysis showed that corn grain grain length, volume and maturity grain moisture content was significantly positively correlated. Description:grain, the lower the water content of maturity.(4) During Grain Grain Moisture Content and fat content was significantly positively correlated with grain protein content, starch content was negatively correlated. Note: The lower the fat content of grains, grain protein content, the higher the starch content, the lower the water content of maturity.(5) stem diameter, ear diameter, ear weight, ear height and grain grain moisture content was significant or very significant positive correlation, wherein the correlation coefficient panicle and harvest of grain moisture content of the largest, followed by ear diameter height, stem diameter, indicating that the grain moisture content is closely related to the harvest period, due to lower breeding ear weight, ear diameter, ear height, stem diameter help to reduce the moisture content of grain maturity. Spike leaves, rows per ear and grain moisture content was positively correlated, indicating breeding appropriate to reduce the ear lobe, ear rows help to reduce the moisture content of grain maturity. Spike length, number of grain row and grain moisture content was negatively correlated, indicating breeding increase ear length, number of grain rows help to reduce the moisture content of grain maturity.