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不同的烟草移栽期,使叶片成熟期不同,从而引起烟叶内在品质的差异。近三十年间,烟苗移入大田的时间有较大的变动。1969年以前,烟苗移入大田的时间一般在五月上旬和中旬,烟苗带叶5—6片,整个大田生长期达120—140天。1968年以后,烟苗移栽又提前到3月下旬至4月上旬,烟苗带叶10片左右,使整个大田期缩短到90—110天,造成品质下降,收益减少。究竟何时移栽烟苗合适,能获得优质适产,增加收益?下面从农业气候的角度予以分析。
Different tobacco transplanting period, different leaf maturity, which led to differences in the internal quality of tobacco. Nearly three decades, tobacco seedlings into the field time has changed a lot. Before 1969, tobacco seedlings moved to the fields generally in early May and mid-May, 5-6 tobacco leaves with leaves, the growth of the entire field of 120-140 days. After 1968, the transplanting of tobacco seedlings was advanced to the end of March to early April, with about 10 pieces of tobacco leaves and leaves, shortening the entire field period to 90 to 110 days, resulting in a decrease in quality and a decrease in returns. When exactly suitable for transplanting tobacco seedlings, can get good quality and increase income? The following analysis from the perspective of agricultural climate.