Study on Environmental Risk and Economic Benefits of Rotation Systems in Farmland of Erhai Lake Basin

Tang, Q.; Ren, Tao; Schweers, Wilko; Liu, Hongbin; Lei, Baokun; Tao, Lin; Zhang, Gui-long

doi:10.1016/s2095-3119(12)60096-3

Cited by 20 publications

(6 citation statements)

References 14 publications

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“…Garlic (Allium sativum L.) is another crop grown in the same regions where broad bean is grown in China, the two crops are rarely intercropped although both crops may benefit from intercropping. Our earlier work revealed that intercropping of garlic and broad bean is suitable for planting in China because the practice improved yield and land use efficiency with land equivalent ratio of 1.15 (Tang et al 2012(Tang et al , 2013. The basis for these benefits may be attributed to complementary N utilization and transfer between these two crops in an intercropping system.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen uptake and transfer in broad bean and garlic strip intercropping systems

Tang

Tewolde

Liu

et al. 2018

Journal of Integrative Agriculture

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Utilization and transfer of nitrogen (N) in a strip intercropping system of garlic (Allium sativum L.) and broad bean (Vicia faba L.) have been investigated rarely. The objectives of this study were to quantify N uptake and utilization by intercropped broad bean and garlic and determine the magnitude of N transfer from broad bean to garlic. Field and pot trials were carried out in the Erhai Lake Basin in China using 15 N tracer applied to the soil or injected into broad bean plants. Strip intercropping of garlic and broad bean increased N absorption (47.2%) compared with sole crop broad bean (31.9%) or sole crop garlic (40.7%) and reduced soil residual N. Nearly 15% of 15 N injected into petioles of broad bean intercropped with garlic was recovered in garlic at harvest, suggesting that N could be transferred from broad bean to strip intercropped garlic. The findings provide a basis for evaluating legumes' role in optimizing N fertilization when intercropped with non-legumes.

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Section: Introductionmentioning

confidence: 99%

Nitrogen uptake and transfer in broad bean and garlic strip intercropping systems

Tang

Tewolde

Liu

et al. 2018

Journal of Integrative Agriculture

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“…A previous study also showed that TN loss from agricultural land via runoff increased with increasing N fertilizer application rates [41]. However, Tang et al [71] found that N concentration in the overflow water was very high within approximately a week after fertilization in a paddy field. However, people with less land and decentralized operation in the Erhai Lake Watershed tended to transplant and fertilize rice one after another for approximately ten days, which prolonged the influencing time of agricultural activities on the water quality.…”

Section: Critical Period Of Nitrogen Deposition and Runoffmentioning

confidence: 93%

Nitrogen Transport/Deposition from Paddy Ecosystem and Potential Pollution Risk Period in Southwest China

Guo

Yan

Zhai

et al. 2022

Water

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Nitrogen (N) losses through runoff from cropland and atmospheric deposition contributed by agricultural NH3 volatilization are important contributors to lake eutrophication and receive wide attention. Studies on the N runoff and atmospheric N deposition from the paddy ecosystem and how the agriculture-derived N deposition was related to NH3 volatilization were conducted in the paddy ecosystem in the Erhai Lake Watershed in southwest China. The critical period (CP) with a relatively high total N (TN) and NH4+-N deposition occurred in the fertilization period and continued one week after the completion of fertilizer application, and the CP period for N loss through surface runoff was one week longer than that for deposition. Especially, the mean depositions of NH4+-N in the CP period were substantially higher than those in the subsequent period (p < 0.01). Moreover, agriculture-derived NH4+ contributed more than 54% of the total NH4+-N deposition in the CP period, being positively related to NH3 volatilization from cropland soil (p < 0.05). The N concentrations were higher in the outlet water of ditches and runoff in May than in other months due to fertilization and irrigation. Therefore, to reduce the agricultural N losses and improve lake water quality, it is important to both reduce agricultural NH4+-N deposition from NH3 volatilization and intercept water flow from the paddy fields into drainage ditches during the CP.

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“…Many studies have also shown that reducing the application of fertilizers and improving the processes of fertilization are effective means to reduce the pollution load on agricultural land [29]. The determination of management measures should not only consider the reduction of pollution loads but also consider the impact on ecology and socio-economic [30]. Changing the type of agricultural land, reducing the amount of fertilizer application, and to a certain extent leading to a reduction in food production will inevitably reduce the income of local farmers, which will bring a series of social problems and even affect national food safety [31].…”

Section: Impact Of Filter Strips On Pollution Reductionmentioning

confidence: 99%

Study of Nitrogen Pollution Simulation and Management Measures on SWAT Model in Typhoon Period of Shanxi Reservoir Watershed, Zhejiang Province, China

Chen¹,

Chen²,

Liu³

et al. 2021

Pol. J. Environ. Stud.

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In this study, the Shanxi Reservoir watershed, which is greatly affected by typhoons, is used as the research object, two daily scale SWAT models are established for the dry and wet seasons. Two different typhoon processes in 2007 and 2008 are selected to analyze the pollutant loads during the typhoon period and the reduction of the pollution loads by filter strips. This study focuses on the pollutant load during the typhoon and the reduction effect of management measures, proves seasonal modeling according to regional climate characteristics dramatically improves the accuracy of the model, broadens the perspective of watershed pollution prevention and control. The results show that: the pollutant output of the Shanxi Reservoir watershed is mainly agricultural land, and is positively correlated with precipitation and runoff; loads of organic nitrogen and nitrate nitrogen during typhoon 1 and typhoon 2 accounted for 22.18% and 9.14%, 22.53%, and 18.08% of the whole year, respectively. The pollution loads of typhoon 2 relative to typhoon 1 is relatively small; when the width of the filter strips reaches 3m, the reduction of ammonia nitrogen loads can reach more than 50%, which proves a visible effect on reducing pollutant loads during typhoons.

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Study on Environmental Risk and Economic Benefits of Rotation Systems in Farmland of Erhai Lake Basin

Cited by 20 publications

References 14 publications

Nitrogen uptake and transfer in broad bean and garlic strip intercropping systems

Nitrogen uptake and transfer in broad bean and garlic strip intercropping systems

Nitrogen Transport/Deposition from Paddy Ecosystem and Potential Pollution Risk Period in Southwest China

Study of Nitrogen Pollution Simulation and Management Measures on SWAT Model in Typhoon Period of Shanxi Reservoir Watershed, Zhejiang Province, China

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