期刊
IRRIGATION AND DRAINAGE
卷 68, 期 4, 页码 729-739出版社
WILEY
DOI: 10.1002/ird.2351
关键词
flue-cured tobacco; drought; microbial water-retention fertilizer; leaf area index; photosynthetic characteristics
资金
- Science and Technology Project of Guizhou Tobacco of the China National Tobacco Corporation [201709]
- Science and Technology Project of the Tobacco Company of the Southwest of Guizhou Province [JS-JL-11/D 201502]
- Postgraduate Research and Practice Innovation Programme of Jiangsu Province [SJCX17_0129, SJZZ16_0083]
- Fundamental Research Funds for the Central Universities [2014B04814, 2015B05814, 2016B04314]
Drought has become a severe and frequently happening issue in the Guizhou province of China due to unevenly distributed rainfall and long-term continuous cropping. Since drought and continuous cropping could be significant in causing the soil environment to deteriorate, measures which are beneficial for improving the growth of crops need are of great concern. In this study, drought conditions and a microbial water-retention fertilizer (MWF) were applied as influencing factors for the leaf area index (LAI) and photosynthetic characteristics of flue-cured tobacco. Under different drought conditions, the largest leaf area was obtained in normal conditions combined with 45 g basin(-1) MWF (T13), which significantly increased by 32.0% when compared to normal conditions combined with 0 g basin(-1) MWF (T1). An index model was further used to validate the above-mentioned results and the correlation coefficients of LAI among different treatments were precisely simulated (0.981-0.993). The MWF had remarkable effects on tobacco's net photosynthetic rate (P-n), stomatal conductance (G(s)), intercellular CO2 concentration (C-i) and transpiration rate (T-r). Furthermore, normal conditions (550 mm irrigation) combined with MWF (45 g basin(-1)) proved to be the preferable strategy for improving water use efficiency as well as the tobacco plantation. The results might provide theoretical and practical guidance for the growth of crops in areas with water shortage. (c) 2019 John Wiley & Sons, Ltd.
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