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叶龄是反映玉米生长发育的形态指标,是对玉米实行科学管理的可靠依据。适时施肥扩大株叶面积,提高叶面积系数,是争取玉米高产的关键。为此省玉米高稳优低协作组于1979——1981年设立了不同叶令追肥的试验研究,并于1982年进行了扩大示范,现将结果报告如下:
Leaf age is a morphological indicator of maize growth and development, is a reliable basis for scientific management of corn. Timely fertilization to expand plant leaf area, increase leaf area coefficient, is the key to high yield of corn. To this end the high and low corn high and low collaboration group set up in 1979-1981 different leaf top dressing research, and conducted in 1982 to expand the demonstration, the results are reported as follows: