[1]ZHANG Xiaohua,WANG Keqin,SONG Yali,et al.Effects of Organic Fertilizer Application on Nitrogen and Phosphorus Balance in Flue-Cured Tobacco Sloping Farmland in Central Yunnan Province[J].Research of Soil and Water Conservation,2020,27(06):28-36.
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Effects of Organic Fertilizer Application on Nitrogen and Phosphorus Balance in Flue-Cured Tobacco Sloping Farmland in Central Yunnan Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
28-36
Column:
目次
Public date:
2020-10-20
- Title:
- Effects of Organic Fertilizer Application on Nitrogen and Phosphorus Balance in Flue-Cured Tobacco Sloping Farmland in Central Yunnan Province
- Keywords:
- balance of nitrogen and phosphorus; nitrogen and phosphorus loss; organic fertilizer application; soil content; contents of nitrogen and phosphorus
- CLC:
- S157
- DOI:
- -
- Abstract:
- In order to explore the effects of different organic fertilizer application inputs on the main input and output of nitrogen and phosphorus balance in the farmland ecosystem, tobacco farmland ecosystem in Erlongtan small watershed in central Yunnan Province was taken as the research site. Six kinds of organic fertilizer application amounts were CK(0.00 kg/m2), T1(0.25 kg/m2), T2(0.50 kg/m2), T3(0.75 kg/m2), T4(1.00 kg/m2)and T5(1.25 kg/m2).The effects of six kinds of organic fertilizer application amounts on runoff, sediment loss, soil residual amount of nitrogen and phosphorus and tobacco absorption amount in flue-cured farmland ecosystem were studied after applying the chemical fertilizer under natural rainfall conditions. The results showed that:(1)with the increase of the application amount of organic fertilizer, the average concentration of total nitrogen and total phosphorus loss in runoff and sediment as well as the total nitrogen and phosphorus loss amounts in runoff and sediment decreased under four events of rainfall, which decreased in the order: CK>T1>T2>T3>T4>T5;(2)after tobacco harvest, the contents of total nitrogen, alkali-hydrolyzed nitrogen, total phosphorus and available phosphorus in soil were all higher than the background value, which were 20.53%～40.07%, 52.83%～209.44%, 19.53%～62.79% and 25.79%～205.11% higher than those of the background, respectively;(3)the contents of stems, roots and leaves of flue-cured tobacco increased gradually with the increase of the application amount of organic fertilizer; when the application amount reached 1 kg/m2(T4), the nitrogen and phosphorus contents of flue-cured tobacco organs reached the peak within this fertilization interval;(4)nitrogen and phosphorus loss with runoff accounted for 8.19%～56.91% and 15.28%～46.72% of nitrogen and phosphorus input by fertilizer, sediment loss accounted for 3.05%～9.21% and 16.14%～33.33%, soil nitrogen and phosphorus residues accounted for 0.39%～68.37% and 0.10%～64.21%, and flue-cured tobacco absorption accounted for 20.39%～33.49% and 11.83%～19.87%. Comprehensive consideration of tobacco production, cost input and environmental benefits, T4 treatment can not only ensure the contents of nitrogen and phosphorus in flue-cured tobacco, but also significantly reduce the losses of nitrogen and phosphorus in runoff, which is an environmentally friendly fertilization method.
- References:
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Last Update:
2020-10-20