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[1]Zhou Ping,Fang Ke,Zhao Nan,et al.Influence of the Condition of Different Dosages of Water Retaining Agent Application on Soil Water Content and Soil Nutrients and the Indices of the Flue-Cured Tobacco Quality in Purple Soils of Southwest of China[J].Research of Soil and Water Conservation,2024,31(05):53-63.[doi:10.13869/j.cnki.rswc.2024.05.031]

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Influence of the Condition of Different Dosages of Water Retaining Agent Application on Soil Water Content and Soil Nutrients and the Indices of the Flue-Cured Tobacco Quality in Purple Soils of Southwest of China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 05 Page number: 53-63 Column: Public date: 2024-08-10

Title:: Influence of the Condition of Different Dosages of Water Retaining Agent Application on Soil Water Content and Soil Nutrients and the Indices of the Flue-Cured Tobacco Quality in Purple Soils of Southwest of China

Author(s):: Zhou Ping^1,2, Fang Ke^1,2, Zhao Nan^1,2, Ju Zhen^1,2, Zhuang Wenhua³, Yang Junwei⁴, Ye Tianhui⁴, Zhang Dan¹; (1.The Key Laboratory of Mountain Surface Processs and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.State Key Laboratory of Hydraulics and Mountain River Engineering, College of Hydraulic and Hydroelectric Engineering, Sichuan University Chengdu 610065, China; 4.Sichuan Tobacco Corporation Panzhihua Branch, Panzhihua, Sichuan 617061, China)

Keywords:: water retention agent; soil water content; soil nutrients; the indices of flue-cured tobacco quality; correlations

CLC:: S156.2

DOI:: 10.13869/j.cnki.rswc.2024.05.031

Abstract:: [Objective]The aims of this study are to clarify the characteristics and influence of soil water content, soil porosity, soil nutrients and the flue-cured tobacco quality in the condition of different dosage of water retaining agent(Potassium polycalcium), to apply the important supply to relieve drought and enhance the quality of the tobacco. [Methods]The random-groups design and the condition of different dosages of water retention agent were adopted to measure the indices of soil water content, soil nutrients and tobacco quality. [Results]As the dosages of water retention agent increased, the soil pH value changed from 7.4 to 7.7, total porosity, capillary porosity, soil saturated water content, field capacity, capillary water content first increased then decreased, when the dosage of water retaining agent reached to 150 kg/hm², the value of soil bulk density reached to the lowest value. However, the values of total porosity,capillary porosity, soil saturated water content and capillary porosity reached to the highest values. The value of CEC showed fluctuated changes. With the increased of the dosages of water retention agent, the soil organic carbon, soil total potassium, available potassium first increased then decreased. However, the total nitrogen, total phosphorus, alkali-hydrolyzed nitrogen and available phosphorus showed the increasing trends. But the bulk density first decreased then increased. The chlorine and total nitrogen of the tobacco leaves showed the trends of the upper leaves<the middle leaves<the lower leaves, and as the concentrations of the water retention agent increased, the content of the chlorine of the tobacco leaves showed the fluctuating change. The potassium of middle and upper leaves of the tobacco leaves were higher than that of the lower leaves. And it increased as the concentrations of the water retention agent increased. The content of nicotine changed as the order:the upper leaves>the middle leaves>the lower leaves, and there existed the weak correlation between nicotine and the concentration of the water retention agents. The reducing sugar and total sugar showed the similar change trends. The ratio of potassium and chlorine changed as the order:the upper leaves>the middle leaves>the lower leaves, and showed the fluctuating change trends as the concentration of water retention agent increased. However, the ratio of nicotine and total nitrogen and the ratio of sugar and alkaline showed the order:the upper leaves<the middle leaves<the lower leaves, and the two ratios increased as the concentration of water retention agents increased. Meanwhile, there existed the significant positive correlation between the soil total nitrogen and the chlorine contents, the potassium of the upper leaves, the reducing sugar(p<0.05). Also there existed the significant positive correlation between the soil organic carbon and the chlorine contents, the reducing sugar, the potassium of the upper leaves, the nicotine of the lower leaves(p<0.05). [Conclusion]Above all, the dosage of 150 kg/hm²is considered as the best dosage to soil amelioration in southwest China. Also this study can supply the basis and data supports to the anti-drought ability and enhance the flue-cured tobacco quality.

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Last Update: 2024-08-10