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选好留足甘薯种,是夺取下年甘薯丰收的重要环节。根据各地的经验,选留好甘薯种应注意做到“六要”: 一要选留秋甘薯做种。秋甘薯生长期短,收获时生活力强,抗病性也较强,而且薯种大小适宜,耐贮藏。夏甘薯生长期长,收获时生活力已经衰退,抗病性降低,也不耐贮藏,不宜做种。二要在地势高燥、土壤疏松、排水良好、高垅栽培的秋甘薯地里选种。因为这样的地块土壤条件好,甘薯生长健壮,抗病,耐贮藏。涝洼地的薯块病害较重,皮薄,含水多,不耐贮藏,不宜做种。三要适时收获。甘薯块根是无性营养体,没有
Selected leave enough sweet potato species, sweet potato harvest is an important part of the harvest next year. According to local experience, choose to retain sweet potato species should pay attention to “Six to ”: one to choose to stay autumn sweet potato species. Autumn sweet potato growth period is short, strong vitality at harvest, disease resistance is also strong, and potato size suitable, resistant to storage. Summer sweet potato growth period, the vitality has declined when harvesting, disease resistance is reduced, are not resistant to storage, should not be done. Second, to be high in the dry terrain, loose soil, well-drained cultivation of sweet potato cultivation in highland sweet potato selection. Because such a lot of soil conditions, sweet potato robust growth, disease resistance, storage resistance. Waterlogged depression tuberous diseases heavier, thin skin, watery, stale, should not be kind. Three to be timely harvest. Sweet potato root is a vegetative body, no