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江西双季早稻在3月中、下旬播种,早、晚两季均能早熟高产,但此时旬均气温仅12.6℃,故烂秧严重。80年代初大量采用薄膜育秧后,基本解决了烂秧问题,成熟提早受到农民欢迎。但由于膜内3月下至4月上旬气、地温分别比露地高2.4—4.7℃及0.4—3.5℃,平均气温达17.3—19.2℃,平均相对湿度为97.5％,每日结露15—18小时,秧苗生长快,而抗病力弱造成覆膜育秧始病期比露地早20—25天。叶瘟始见后6及12天,病株率分别达7.9％及91.0％,防治稻瘟病已成了薄膜育秧这一丰产技术推广的重要问题。
Jiangxi double-season early rice in March, late sowing, early and late seasons can be early maturity and high yield, but at this time average temperature only 12.6 ℃, so rotten seedling serious. The early 1980s after extensive use of film seedlings, the basic solution to the problem of rotten seedlings, mature farmers welcomed by early. However, due to the membrane from March to early April, the ground temperature was 2.4-4.7 ℃ and 0.4-3.5 ℃ respectively higher than the open field. The average temperature was 17.3-19.2 ℃, the average relative humidity was 97.5% and the daily dew condensation was 15-18 Hours, seedlings grow fast, while the weak resistance to disease caused by the filming seedling initiation period of 20-25 days earlier than the open field. Six and 12 days after the onset of the leaf blast, the diseased plants rates reached 7.9% and 91.0% respectively. The prevention and control of rice blast has become an important issue for the popularization of thin-film seedlings.