Growing Rape Plants with Double Purposes for Soiling and for Seeds.

[摘要] Field tests with 8 varieties of the rape plant to be used both for soiling and for seed yielding in combination were carried out, 1952 to 1954. 1. Defoliation test : The weight of the removed leaves in the early cut-plot was heavier than that in the late-cut ones. And the yield of seeds was to the contrary, but not as much as in the check. In both plots, the oil percentage of seeds was higher than that of the check, except "CO"-varieties. The total amount of oil per plot as the yield of seeds, was larger in the late-cut-plot. The variation in the total amount of oil per plot at each defoliation date was like that which was found in the yield of seeds. 2. Cut-off-amount test: The yield of seeds decreased in inverse proportion to the increase of the amount of soiling. 3. Cut-off-time test: The quantity of soiling increased according as the cut-off-time became later. But, the yield of seeds, the oil percentage and the total amount of oil content per plot, all decreased. Growing rape plants both for soiling and for seed yielding would become possible if favorable varieties be choosed or more proper cut-off-date be decided experimentally. In other way, it will more likely become practical by attaching importance to either soiling or seed yielding.

[学科分类] 农业科学（综合）