不同玉米品种对肥力反应敏感性的初步研究

不同玉米品种对肥力反应的敏感性有差别,主要表现在低肥力条件下产量降低,绿叶面积和单株叶面积下降,生育延迟等方面变化幅度上,株高、穗位高、叶片数等受肥力影响均都较小。在低肥条件下绝对产量高的类型,耐瘠薄。单交种对肥力反应的敏感性,与其双亲自交系的表现关系密切。

PRIMARY RESEARCH ON THE SENSIBILITY OF DIFFERENT GENOTYPES OF CORN TO THE FERTILE LEVELS OF FIELD

The sensibility of different genotypes of Corn to the fertile levels of field was varied as follows:In lower fertile level field, the area of green leaves and the leave area per plant were decreased and the periods of plant growthg were prolonged, but plant height, the height of ear node and leave number had little change. The genotypes which were high in yield under the lower fertile field had good endurance to the barren field. The sensibility of hybrids of single-crosses to different fertile levels of field was closely associated with their parent lines.