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平阴县洪范池镇北任村任德利:我们当地有种植地瓜的习惯,每年种植的红瓤地瓜大都销到济南、青岛等地。近几年,种植地瓜效益一直不错。眼下正处于地瓜育苗期,今年不知什么原因,地瓜苗长势一直较弱,叶片不伸展。另外,每年在地瓜育苗期和定植期间容易发生地瓜苗黑根现象。还有一种病害是在地瓜收获后,进入储藏期容易发生腐烂病,腐烂的地瓜长有白毛,有一股酸臭味。请问是何原因,该如何防治?青岛农业大学张立宁教授:任德利反映的情况,带有普遍性,归纳为三个问题:一是地瓜育苗期需科学的管理和正确调
Pingyin Hongfanchi Town North Village Ren Deli: We have the habit of planting sweet potatoes, sweet potatoes are mostly sold each year in Jinan, Qingdao and other places. In recent years, the benefit of planting sweet potatoes has been good. At the moment is in the sweet potato breeding seedlings, I do not know why this year, the growth of sweet potato has been weak, the leaves do not stretch. In addition, each year during the sweet potato seedling growth and planting prone to blackberry phenomenon. There is also a disease is in sweet potatoes after harvest, into the storage period prone to rot disease, rotten sweet potatoes have white hair, a sour smell. What are the reasons, how to prevent? Professor Zhang Lining Qingdao Agricultural University: Renderley reflect the situation with universal, summarized in three issues: First, sweet potato nursery need scientific management and correct