Liu Y.,Yunnan Agricultural University |
Yu L.,Yunnan Agricultural University |
Zhao Z.,Yunnan Agricultural University |
Que J.,Kunming Tobacco Company |
And 6 more authors.
Acta Tabacaria Sinica | Year: 2013
Effect of three different methods of plastic film management on moisture and soil temperature, and yield, economic value, chemical components of YUN97 were investigated with field experiments in Zhaotong Ludian. Results showed that: (1) Completely removing film mulching resulted in the lowest soil moisture content at depth of 0-10 cm, and was 20.91% lower than whole growth period mulching and 4.22% lower than not completely removing film processing during mature stage. Compared with other treatments the whole growth period mulching has a higher soil moisture content at 10-20 cm soil depth during lower stalk position leaves mature stage, and a lower soil moisture after lower leaves matured. Overall soil moisture content of not completely removing film processing had less volatile than other treatments. (2) Completely removing film mulching had the lowest soil temperature at the depth of 0-10 cm, which was 2.34°C lower than that of whole growth period mulching and 1.72°C lower than not completely removing film processing during mature stage. (3) Yield difference between treatments was non-significant in two years field experiments and economic value of not completely removing film processing was relatively higher or significantly higher than the rest of the processing. (4) Nicotine content of control was higher than other treatments. There was on significant difference between treatments for potassium content and nitrogen content. Sugar-nicotine ratio and nitrogen-alkali ratio of not completely removing film processing were better-balanced than other treatments. Not completely removing film processing can be applied in production in tobacco-growing areas of the high-altitude.