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在无产阶级文化大革命和批林批孔运动的推动下,农业生产上应用化学物理方法改善农田小气候的研究工作有很大进展。保墒增温剂是进年来发展起来的一种保持土壤水分、提高土壤温度的有效复盖剂之一。它是利用含有石油树脂成分的成膜物质加工制
Prompted by the proletarian cultural revolution and the pro-Lin campaign, great progress has been made in the application of chemical and physical methods to agricultural microclimates in agricultural production. Moisturizing warming agent is developed in recent years to maintain a soil moisture, soil temperature and effective one of the cover agent. It is the use of film-forming substances containing petroleum resin processing components