大豆收获籽粒兼采叶饲用研究 Ⅱ.不同时间和部位对采叶效果的影响

STUDY ON HARVESTING SEEDS TOGETHER WITH LEAVES AS FORAGE IN SOYBEAN II . Effects of Plucking Leaves in Different Periods and Positions

在1986年作了采叶对不同大豆品种的影响试验后,于1988年再次进行了大豆的分期采叶和上、下部位采叶试验。结果:收获籽粒兼采叶饲用能提高干物产量;不同品种各有其蛋白产量最高时的最佳采叶适期,通过观察不同时间采叶的黄叶率和荚粒发育程度可以确定最佳采叶时间;最好的采叶方式为掌握植株下部叶尚青将黄时从下而上的分期分批采叶;粒叶产量高、叶片青叶期长的品种适宜于收获籽粒兼采叶饲用。

After experiment about effects of plucking leaves on different soybean cultivars in 1986, we conducted another experiment with soybean to study the rational plucking periods and positions of leave in 1988. The experiment shows that the dry matter can be raised by harvesting seeds with plucking leaves. The different cultivars have its most favorable period for plucking when the protein yield reachs maxium, and also the most favorable period can be determined by means of measuring the rate of yellow leaves and growth of pods and seeds in different time. It is the best way to pluck the leaves from low to high by stages when the low-position leaves begin to turn into yellow. The result also indicates that cultivars with high yield in both seeds and leaves, long term of green leaves are fitter for plucking leaves as forage.