【摘要】 引进长沙圣华科技发展有限公司生产的“农用保水膜”试验结果:盆载试验保水膜提高烟田土壤相对持水量(以饱和含水量%表示)1.9%~10.6%;保水膜保水效果与降雨量呈明显正相关。即阶段降雨量丰沛,土壤相对持水量高;保水膜保水效果显现性与阶段降雨量成显著负相关,即降雨少,置保水膜各处理土壤含水量与对照差异大。由于保水膜能有效调控烤烟土壤含水量,促进了烤烟光合速率,因而有利烤烟产量提高、品质改善,产量每667 m2增加7.8~16.1 kg,增产10.2%~21.0%。风干烟叶全钾含量较对照高0.29%~0.50%。两个大田试验保水膜对提高烟田土壤田间持水量效果经方差分析,用SSR法进行多重比较,置保水膜处理与对照比较差异均达显著水平。因而有利烤烟根系伸展,烤烟根系伸展2个高峰期(移栽后20~30 d和移栽后50~60 d),置保水膜较对照分别长1.5 cm和0.9 cm,增加9.9%和8.8%;绿叶面积增加,第9、10、11片叶面积较对照增大104.2~136 cm2;烤烟每667 m2增产9.7~22.3 kg;风干烟叶全钾含量提高1.6~7.5个百分点;中上等烟比例提高0.3%~12.9%;产值每667 m2增加61.77~100.69元。更多还原

【Abstract】 The keeping water membrane for agriculture made by Changsha Shenghua Science and Technology Corporation was presented,the experiment result indicated:the membrane improved relative moisture capacity 1.9%～10.6% of soil in tobacco field,the effect of keeping water and rainfall amount be positive correlation in evidence.In other word,when rainfall is small,the check difference on moisture capacity of soil is apparent.Because water retention membrane regulated and controlled the moisture capacity of soil in tobacco field,advanced photosynthesis of tobacco,improved yield and quality of tobacco,the output increased 7.8～16.1 kg/667 m~2,which improved 10.2%～21.0%.Kalium in air drying tobacco leaf increased by 0.29%～0.50%.By analysis of variance and SSR multiple comparisons,in two tobacco fields,the check difference was apparent which paved the keeping water membrane compared with another without it.Moreover,the water holding membrane was propitious to extend the root system of tobacco.During actinium of extending the root system of tobacco,the root increased(1.5) cm and 0.9 cm respectively compared with another without membrane,which improved 9.9% and 8.8%.The area of greenery increasing,the area of No.9,No.10 and No.11 greenery increased 104.2～136 cm~2,the output increased 9.7～22.3 kg/667 m~2,Kalium in air drying tobacco leaf improved by 1.6%～7.5%,the middle and high class tobacco leaf improved by(0.3%)～12.9%,production value increased 61.77～100.69 Yuan per 667 m~2.更多还原