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为增加收入,在鹿儿岛等地区推广了以早收和高产为目标的甘薯地膜覆盖栽培。因出售的甘薯作高级点心之用,故要求薯皮红色、薯肉黄色、粉质、外观纺锤形。地膜覆盖可确保其早熟以及品质与风味良好.这样势必采用连作。为防止连作时的土壤病害,反复施用氯化苦又导致多种异常症状,主要有粗皮症、溃疡症和开裂症等。这已成为生产上的严重问
In order to increase their incomes, the cultivation of sweet potato mulch has been promoted for the purpose of early harvest and high yield in areas such as Kagoshima. Due to the sale of sweet potatoes for the use of advanced desserts, so the requirements of potato red, yellow flesh, silty, spindle appearance. Film mulching ensures precociousness as well as good quality and flavor. In order to prevent continuous cropping soil diseases, repeated application of chloropicrin and lead to a variety of abnormal symptoms, mainly dermal disease, ulcer disease and schizophrenia. This has become a serious production question