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我们自1973年以来,开展了培育红薯种子的试验,取得一些成效。每亩种子地可收种子13斤左右(还能收地下亲本薯块4,500多斤)。甘薯种子的千粒重约15.62克,每斤种子32,010粒。用种子育苗扦插于大田,若每亩3,700—4,000株,每斤种子可剪2—3道苗,即可扦插35亩以上,春播的大田一般亩产鲜薯5,000多斤。培育甘薯种子,应抓好以下几个环节:一、早育苗,早扦插种子地:为了延长生长期,应早育苗,早扦插,特别是无霜期短的地区,应尽量在早春霜冻结束之后,就把亲本薯苗扦插到种子地。我们这里地处北纬30度半高山,常是清明断雪、谷雨断霜。因而一般于春分用简易
Since 1973, we have carried out experiments to cultivate sweet potato seeds and achieved some results. Seeds per acre can be received about 13 pounds of seeds (but also receive the underground potato 4,500 kilos). The 1000-grain weight of sweet potato seeds is about 15.62 grams, 32,010 seeds per kilogram. With seed nursery cuttings in the field, if the 3,700-4,000 per acre, seeds per catty can cut 2-3 seedlings, you can cuttings more than 35 acres, spring sowing generally yield 5,000 kilos of fresh land per mu. In order to prolong the growth period, should be early nursery, early cutting, especially frost-free short areas, should be as early as the end of the frost in the spring, it is necessary to cultivate sweet potato seeds, should grasp the following aspects: First, early nursery, The pro-potato seedlings cuttings to the ground. We are located here 30 degrees north latitude semi-alpine, often Ching Ming off snow, Guyu off frost. It is generally easy to use in the spring equinox