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据调查,我区甘薯栽培上存在有十条通病:(1)老地年年种。老地年年连种甘薯,病害重,虫害猖獗,杂草多,抗旱及抗寒力减低,藤蔓不振,秋季早衰,产量低。(2)耕犁浅又薄。长期以来耕犁深度只有二、三寸深,耕层浅薄,根系生长受到局限,土壤透气性差,蓄水保肥能力低,土壤肥力不易发挥。(3)苗缺,栽太迟。按照我区气候四月下旬至五月上旬就可以大规模栽种,但因薯苗不足,多半拖到五月下旬才开始栽,到六月上、中旬栽完,扦插时间迟一个月左右。(4)栽稀,苗又弱。
According to the survey, sweet potato cultivation in our area there are ten common diseases: (1) old and old. Year after year even with sweet potato, heavy diseases, pests rampant, weeds and more drought and cold reduction, vines, premature aging autumn, low yield. (2) plow shallow and thin. For a long time, the depth of plowing was only two or three inches deep, with shallow tillage, limited root growth, poor soil aeration, low water storage and fertility, and poor soil fertility. (3) Seedlings missing, planted too late. In accordance with the climate in our region from late April to early May can be large-scale planting, but insufficient potato seedlings, mostly until late May began to planted in June, mid-planted End cutting time a month or so. (4) Planting thin, weak seedlings.