营养液碳酸氢盐浓度对生长介质pH、电导率和移栽烤烟产量和品质的影响

中国烟草科学 Pub Date : 2000-01-01 DOI:10.3381/0082-4623-44.1.27

L. Reynolds

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引用次数: 1

摘要

摘要研究了碳酸氢盐(HCO3−)浓度对直接播种悬浮温室系统中烤烟幼苗产量的影响，并将其与淤泥苗床生产的幼苗进行了3年的比较。使用的HCO3−浓度(0,100,200,400和800mg /L)通过H2SO4酸化或通过向含有100 L施肥地下水的容器中添加NaHCO3来产生并保持在所需的水平。每个100 L的容器(处理)包含四个253个孔的泡沫托盘，放置在加热和强制通风的双聚温室中，温度保持在15°至30°C。除800 mg/L HCO3−处理外，其余处理均能产生优质幼苗。在所有处理中，初始营养液pH随HCO3−浓度变化，随时间线性下降。初始堵塞介质pH也随HCO3−浓度的变化而变化;pH升高约25 d，然后下降到略高于营养液pH的水平。

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NUTRIENT SOLUTION BICARBONATE CONCENTRATION EFFECTS ON GROWTH MEDIA pH, ELECTRICAL CONDUCTIVITY, AND ON FLUE-CURED TOBACCO YIELD AND QUALITY FOR TRANSPLANTS PRODUCED IN A HEATED GREENHOUSE IN A DIRECT-SEEDED FLOAT SYSTEM

Abstract The effects of bicarbonate (HCO3−) concentrations on the production of flue-cured tobacco seedlings in a direct-seeded float greenhouse system were investigated and compared to seedlings produced in muck seedbeds over a three-year period. The HCO3− concentrations used (0, 100, 200, 400, and 800 mg/L) were created and maintained at the desired levels by acidification with H2SO4 or by addition of NaHCO3 to tanks containing 100 L of fertilized groundwater. Each 100 L tank (treatment) contained four 253-cell foam trays and was located in a heated and forced-air ventilated double-poly greenhouse maintained at 15° to 30°C. Excellent quality seedlings were produced in all treatments except the 800 mg/L HCO3−. Initial nutrient solution pH varied with HCO3− concentration and declined linearly with time for all treatments. Initial plug media pH also varied with HCO3− concentration; pH increased for about 25 d then declined to a level just above that of the nutrient solution pH. Changes in solution and plug...

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来源期刊

中国烟草科学烟草

自引率

0.00%

发文量

3722

期刊介绍： Chinese Tobacco Science is an academic scientific journal (bimonthly) under the supervision of the Ministry of Agriculture and Rural Affairs of the People's Republic of China, and sponsored by the Tobacco Research Institute of the Chinese Academy of Agricultural Sciences and the Qingzhou Tobacco Research Institute of China National Tobacco Corporation. It was founded in 1979 and is publicly distributed nationwide. The journal mainly publishes academic papers on scientific research results, new production technologies, and modern management in my country's tobacco science research and tobacco production technology. In addition, it also publishes forward-looking review articles in the field of tobacco research. There are columns such as tobacco genetics and breeding, cultivation technology, modulation and processing, physiology and biochemistry, plant protection, review or monograph, quality chemistry, etc.