[Effects of different mulches on rhizosphere temperature, growth, and physiological properties of fluecured tobacco].
With greenhouse plastic film, rice straw plus greenhouse plastic film, soil-mulching plastic film, rice straw, rice straw plus sun-shading net, and sun-shading net as test mulches, this paper studied their effects on the rhizosphere temperature, growth, and physiological properties of flue-cured tobacco. The results showed that after mulching for 22 days, the accumulative rhizosphere temperature at the depth of 5 cm was the highest (424.75 degrees C) for greenhouse plastic film and the lowest (378.75 degrees C) for rice straw plus sun-shading net, while that at the depth of 15 cm was the highest (396.75 degrees C) for greenhouse plastic film and the lowest (368.31 degrees C) for sun-shading net. With the increase of accumulative rhizosphere temperature, the dry weight of above- and underground parts, photosynthesis, and root vigor of flue-cured tobacco tended to increase, and at the 10th day after mulches removal, root biomass had the largest increment in the treatment of soil-mulching plastic film and the smallest increment in the treatment of rice straw plus sun-shading net.
Jia
Zhihong
Z
Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China. jzh-991@163.com
Yi
Jianhua
J
Sun
Zaijun
Z
D000383:Agriculture / Q000379:methods; D017753:Ecosystem; D004780:Environment, Controlled; D018517:Plant Roots / Q000502:physiology*; D012987:Soil / Q000032:analysis*; D013472:Sunlight; D013696:Temperature; D014026:Nicotiana / Q000254:growth & development* / Q000502:physiology
D012987:Soil