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在苏联的许多地区,中欧和北欧各国以及加拿大和美国北部,由于种植收获时籽粒含水量高的粒用玉米,造成了烘干籽粒的额外能耗和康拜因收割困难。计算表明,将玉米籽粒含水量由30％降至13％所消耗的能量,高于生产等量玉米所需的能量。因此,降低玉米收获时籽粒含水量的研究很有实际意义。玉米收获时间由成熟后的籽粒干燥强度决定。果穗的生长发育分为4个时期:1.果穗分化和受精;2.果穗迅速生长,此时叶片面积达
In many parts of the Soviet Union, Central and Northern European countries, as well as in Canada and the northern United States, the additional energy consumption of dry kernels and the difficulty of harvesting of the Combine due to the planting of grain corn with high moisture content at harvest. Calculations show that the energy consumed to reduce the corn kernel water content from 30% to 13% is higher than the energy required to produce the same amount of corn. Therefore, reducing the corn harvest grain water content is of great practical significance. Corn harvest time is determined by the dry strength of the harvested grain. Spike growth and development is divided into four periods: 1. Ear differentiation and fertilization; 2. Rapid growth of the ear, when the leaf area of up to