Suitable For Mechanized Harvesting And High-yielding Maize Grain Filling Characteristics And Photosynthetic Performance Of Planting Density

Xianyu335 are studied in this experiment under the condition of dense planting, Damin3307, Zhengdan958,KX3564,Jinchuang3,Jinchuang998, through the evaluation of screening test materials to mechanization, summarized suitable varieties of their characteristic features, such as grouting at the same time under the different density research suitable for mechanized harvesting variety of density response. According to varieties of mechanization of index selection,Through cluster analysis, it can be divided into two kinds, jade335 is suitable for mechanized harvesting varieties, others are poor for mechanized harvesting varieties. Through variance analysis found that suitable mechanized harvesting and poor varieties in addition to the average filling rate difference, the other of the differences between the grouting parameters reached significant level. Suitable for mechanized harvesting variety of grouting speed, short grouting time, grouting increases with the increase of the density, if reach the density of 10.5×104 plants/hm2, grouting rate and decreased with increasing density of the grouting time. Receive a suitable varieties had a higher chlorophyll relative values, can effectively slow down the ageing, suitable for mechanized harvesting variety of leaf area index, photosynthetic potential, leaf net photosynthetic rate to maintain a higher level, photosynthetic ability is stronger. Stem crushing strength, fracture strength, puncture strength is significantly higher than poor for mechanized harvesting varieties, decreased with increasing of the density, are greatly influenced by the density. If extended appropriately increasing grouting period, shorten the filling fast stage increased duration and grouting slowly increasing duration, speed up the middle and later periods of the grouting grouting rate, maintain higher chlorophyll relative value, reduce based fluorescent, fluorescent increase maximum conversion efficiency, harvest period is, the less the grain moisture content, more suitable for mechanized harvesting.