Analysis On Main Characters Of Different Maize Varieties For Mechanized Grain Harvest

The whole process mechanization is of great significance to the development of corn production,and mechanization harvest is an important link of corn mechanization.The yield quality of corn grain machine is closely related to the characteristics of varieties,and it is an effective way to further realize mechanized harvest by selecting suitable corn varieties.In this study,the 8 corn varieties pushed by the main push in Changchun region in recent years were selected,and the differences between varieties were analyzed from the aspects of plant morphology,stem resistance characteristics,spike leaf photosynthesis characteristics,grain dewatering and grout rate,yield and actual machine yield characteristics,and provided theoretical and experimental basis for selecting suitable corn varieties for the central region of Jilin Province.The test results as follow:1?In the corn plant form and stem resistance,the high coefficient of spike level to Xiangyu 998 and Xiangyu 211 lowest;Liangyu 99 and Liangyu 66 base up the 3rd,4th and 5th section of the stem resistance,unit inter-section dry weight and other anti-fall performance indicators in all varieties in the forefront of all varieties;Maturity R6,aboveground dry matter accumulation to fumin 985 as the largest,Jinnon jade 833 and 1259 lowest.2?In terms of spike leaf photosynthesis and fluorescence properties,the spike leaf photosynthesis characteristics of two corn varieties,Xiangyu 998 and Xiangyu 211,were significantly higher than those of other varieties.In contrast,Liangyu 99 and Liangyu 66 are in the downstream position of all varieties.3?In terms of grain dehydration and grouting rate,the two-year test results showed that the rate of grain dehydration between varieties varied widely in 15 days after pollination,of which the fastest rate of dehydration was Tianyu108,and the slowest for The Jinnonyu 1259.After pollination 25-35 days,the rate of dehydration of various varieties decreased rapidly,Xiangyu 998 reached the maximum value,and The rate of dehydration of Jinnonyu 1259 was the lowest.Pollination 55 days,between the various varieties,the fastest rate of dehydration of Tianyu108.4?In terms of grain yield and machine yield characteristics: Fumin 985,Xiangyu 998 and Tianyu 108 three corn varieties in the test time of the grain yield in 8 varieties higher;In the actual process of machine harvest,Tianyu 108 mature when the water content is the lowest,crushing rate,impurity rate,drop rate and grain drop rate are low,the yield is also in the forefront of all varieties.5?Comprehensive analysis of maize plant morphology and stem lodging resistance,ear photosynthesis and fluorescence,grain yield and filling,etc.This experiment believes that the Xiangyu 998 variety is more suitable for mechanized harvesting in Northeast China.In the actual production,we should consider the various indicators of varieties,in addition to resistance,grain dehydration rate,but also with the varieties of fertility,disease resistance,fertility and grain harvest water content and other indicators combined,conditions allow,can be timely late harvest,in order to reduce the water content of corn seeds,reduce the loss of machine harvest,reduce drying costs,improve production.