小麦生长后期喷施石蜡乳剂(简称液蜡),有减少叶面蒸腾、防止干旱风危害的作用。去年,我们在全县12个大队。搞了800亩的试验。可以明显地看出,喷施液蜡后,液蜡象一层薄膜附着在叶片、叶鞘和穗子的表面上,可以减少植株体内水分的蒸腾,有利于植株后期生理过程的进行。据黄庄大队科技队测定,喷200倍液蜡后,可使旗叶净光合增加,呼吸强度减少。例如去年后期虽没有遇到干旱风天气,但喷了石蜡乳剂的,千粒重仍增加0.4—3.1克,增产率达4—10%。石蜡乳剂原液的配制:原料是 Late spraying of wheat growth paraffin emulsion (referred to as liquid wax), reduce leaf transpiration, prevent the role of drought hazards. Last year, we were in the county 12 brigade. Engaged in 800 acres of trial. It can be clearly seen that the spray of liquid wax, the liquid wax as a thin film attached to the leaves, leaf sheaths and ears on the surface, can reduce water transpiration in plants, is conducive to the late plant physiological processes. According to the determination of Huang Zhuang B team science and technology, after spraying 200 times liquid wax, can make flag leaf net photosynthesis increase, reduce respiratory intensity. For example, late last year, although not encountered in arid wind weather, but sprayed a paraffin emulsion, 1000 grain weight is still increased 0.4-3.1 grams, an increase of 4-10% yield. Preparation of paraffin emulsion stock solution: raw material is