This page has only limited features, please log in for full access.

Unclaimed
Youhua Ma
School of Resource and Environment, Anhui Agriculture University, Hefei, China

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Research
Published: 02 August 2021 in International Journal of Plant Production
Reads 0
Downloads 0

The subtropical region in Eastern China, with abundant hydrothermal resources and widely distributed lowland polders, is a traditional agricultural production area. The rice–wheat rotation system is often regarded as a dominant source of agricultural greenhouse gas (GHG) emissions. Under the general trend of global warming, it is of vital significance to explore farmland production methods for the reduction of GHGs. The study was based on a three-year field experiment conducted to investigate the effects of tillage methods (CF, conventional farming; OF, optimized fertilization; OF + N, optimized fertilization + no-tillage; OF + S, optimized fertilization + straw return) on the emissions of methane (CH4) and nitrous oxide (N2O) collected by way of “closed static box-gas chromatography”. The factors needing simultaneously monitored are atmospheric temperature, 5 cm ground temperature, soil redox potential (Eh), etc. Among the total Global warming potential (GWP) processed by CF, OF, OF + N, and OF + S, the GWP produced by CH4 accounted for 86.01%, 88.23%, 86.34%, and 88.96%, respectively; The sequence of the total yields of rice and wheat is: OF > CF > OF + N > OF + S, the GWP is CF > OF + S > OF > OF + N, and that of greenhouse gas emission intensity (GHGI) is CF > OF + S > OF + N > OF. Comprehensively, tillage methods have great potential to reduce GWP, and OF is considered the optimal tillage method to achieve effective greenhouse gases reduction while ensuring stable and increased production.

ACS Style

Hao He; Tai Zhang; Yao Yao; Wei Yang; Dorcas Busayo; Xiangcheng Wen; Xiaolong Chen; Xiaobing Yang; Shuyun Yang; Youhua Ma. Tillage Methods on Greenhouse Gas Emissions and Yields of Rice–Wheat Rotation System in East China Polder Area. International Journal of Plant Production 2021, 1 -14.

AMA Style

Hao He, Tai Zhang, Yao Yao, Wei Yang, Dorcas Busayo, Xiangcheng Wen, Xiaolong Chen, Xiaobing Yang, Shuyun Yang, Youhua Ma. Tillage Methods on Greenhouse Gas Emissions and Yields of Rice–Wheat Rotation System in East China Polder Area. International Journal of Plant Production. 2021; ():1-14.

Chicago/Turabian Style

Hao He; Tai Zhang; Yao Yao; Wei Yang; Dorcas Busayo; Xiangcheng Wen; Xiaolong Chen; Xiaobing Yang; Shuyun Yang; Youhua Ma. 2021. "Tillage Methods on Greenhouse Gas Emissions and Yields of Rice–Wheat Rotation System in East China Polder Area." International Journal of Plant Production , no. : 1-14.

Journal article
Published: 21 February 2020 in Sustainability
Reads 0
Downloads 0

The evaluation of resources and environment carrying capacity (RECC) is the basis of strategic policy for the development and utilization of regional resources, economic development, and environmental protection. The magnitude of carrying capacity of resources and environment is the result of the balance of multiple aspects including economy, resources, and society. In order to reflect this multi-dimensional vector relationship, a multi-level and multi-targeted evaluation index system needs to be constructed. The paper, adopting the analytic hierarchy process and including PM2.5 (Particulate matter with diameter less than or equal to 2.5 microns in the atmosphere) into the index system, establishes the evaluation system of regional RECC and analyzes the trend of RECC in Hefei city with the index system to put forward the countermeasures of forewarning management. The results are shown as follows: (1) Overall, the RECC in Hefei city presents a declining trend, with a reduction from a middle to lower level during the year 2009 to 2013, of which the year 2010 to 2011 showed the fastest decline and the year 2013 witnessed a slight increase; (2) from the perspective of mutual influence of indexes, the main reason causing the decline of RECC in Hefei city is that the natural resources and environment carrying capacity was in a declining trend from the year 2009 to 2013, respectively declining from middle and high levels to a lower level, while the social economy carrying capacity in Hefei city was in an increasing trend as a whole from the year 2009 to 2013, with an increase from lower level to middle level. From the perspective of the forewarning management of RECC, it focuses on improving the forewarning response system of regional resources and environment carrying capacity, establishes the sharing mechanism of RECC monitoring data and improves the responsibility assigning mechanism of RECC. The study enriches the evaluation index system of RECC and proves that it is reasonable and efficient to build a differentiated index system to scientifically recognize RECC in different regions, having reference value to evaluate similar regional RECC.

ACS Style

Guiyou Zhang; Shuai Luo; Zhuowei Jing; Shuo Wei; Youhua Ma. Evaluation and Forewarning Management of Regional Resources and Environment Carrying Capacity: A Case Study of Hefei City, Anhui Province, China. Sustainability 2020, 12, 1637 .

AMA Style

Guiyou Zhang, Shuai Luo, Zhuowei Jing, Shuo Wei, Youhua Ma. Evaluation and Forewarning Management of Regional Resources and Environment Carrying Capacity: A Case Study of Hefei City, Anhui Province, China. Sustainability. 2020; 12 (4):1637.

Chicago/Turabian Style

Guiyou Zhang; Shuai Luo; Zhuowei Jing; Shuo Wei; Youhua Ma. 2020. "Evaluation and Forewarning Management of Regional Resources and Environment Carrying Capacity: A Case Study of Hefei City, Anhui Province, China." Sustainability 12, no. 4: 1637.

Journal article
Published: 24 October 2019 in International Journal of Environmental Research and Public Health
Reads 0
Downloads 0

Metal(loid) pollution in vegetable field soils has become increasingly severe and affects the safety of vegetable crops. Research in China has mainly focused on greenhouse vegetables (GV), while open field vegetables (OV) and the spatial distribution patterns of metal(loid)s in the surrounding soils have rarely been assessed. In the present study, spatial analysis methods combining Geographic Information Systems (GIS) and Moran’s I were applied to analyze the effects of vegetable fields on metal(loid) accumulation in soils. Overall, vegetable fields affected the spatial distribution of metal(loid)s in soils. In long-term vegetable production, the use of large amounts of organic fertilizer led to the bioconcentration of cadmium (Cd) and mercury (Hg), and long-term fertilization resulted in a significant pH decrease and consequent transformation and migration of chromium (Cr), lead (Pb), and arsenic (As). Thus, OV fields with a long history of planting had lower average pH and Cd, and higher average As, Cr, Hg, and Pb than GV fields, reached 0.93%, 10.1%, 5.8%, 3.0%, 80.8%, and 0.43% respectively. Due to the migration and transformation of metal(loid)s in OV soils, these should be further investigated regarding their abilities to reduce the accumulation of metal(loid)s in soils and protect the quality of the cultivated land.

ACS Style

Qiang Wang; Shanlian Yang; Menglei Zheng; Fengxiang Han; Youhua Ma. Effects of Vegetable Fields on the Spatial Distribution Patterns of Metal(loid)s in Soils Based on GIS and Moran’s I. International Journal of Environmental Research and Public Health 2019, 16, 4095 .

AMA Style

Qiang Wang, Shanlian Yang, Menglei Zheng, Fengxiang Han, Youhua Ma. Effects of Vegetable Fields on the Spatial Distribution Patterns of Metal(loid)s in Soils Based on GIS and Moran’s I. International Journal of Environmental Research and Public Health. 2019; 16 (21):4095.

Chicago/Turabian Style

Qiang Wang; Shanlian Yang; Menglei Zheng; Fengxiang Han; Youhua Ma. 2019. "Effects of Vegetable Fields on the Spatial Distribution Patterns of Metal(loid)s in Soils Based on GIS and Moran’s I." International Journal of Environmental Research and Public Health 16, no. 21: 4095.

Journal article
Published: 04 July 2019 in International Journal of Environmental Research and Public Health
Reads 0
Downloads 0

Selection of rice varieties and application of amendments are effective measures to ensure food safety. Here we report that in the non-Cd area, the grain quality of all rice varieties met the Chinese National Grain Safety Standards (CNGSS). In the high-Cd area, rice varieties showed significant different bioaccumulation of Cd with lower rice yields than those in non-Cd area with the average decrease of 31.1%. There was a negative correlation between grain Cd content and yields. A total of 19 rice varieties were selected as low Cd accumulating rice varieties and their Cd content met CNGSS in the low-Cd area. Six of them met CNGSS in the high-Cd area. The application of amendments significantly reduced Cd content in rice grains by 1.0-84.7% with an average of 52.6% and 13 of varieties met CNGSS. The amendments reduced available Cd content in soils by 1.1-75.8% but had no significant effects on rice yields. Therefore, the current study implied that proper agronomic management with selection of rice varieties and soil amendments was essential in controlling Cd accumulation in rice grains.

ACS Style

Liangmei Chen; Wenge Wu; Fengxiang Han; Jiangxia Li; Wenling Ye; Huanhuan Fu; Yonghua Yan; Youhua Ma; Qiang Wang. Agronomic Management and Rice Varieties Controlling Cd Bioaccumulation in Rice. International Journal of Environmental Research and Public Health 2019, 16, 2376 .

AMA Style

Liangmei Chen, Wenge Wu, Fengxiang Han, Jiangxia Li, Wenling Ye, Huanhuan Fu, Yonghua Yan, Youhua Ma, Qiang Wang. Agronomic Management and Rice Varieties Controlling Cd Bioaccumulation in Rice. International Journal of Environmental Research and Public Health. 2019; 16 (13):2376.

Chicago/Turabian Style

Liangmei Chen; Wenge Wu; Fengxiang Han; Jiangxia Li; Wenling Ye; Huanhuan Fu; Yonghua Yan; Youhua Ma; Qiang Wang. 2019. "Agronomic Management and Rice Varieties Controlling Cd Bioaccumulation in Rice." International Journal of Environmental Research and Public Health 16, no. 13: 2376.

Review article
Published: 22 October 2016 in Environmental Science and Pollution Research
Reads 0
Downloads 0

Nitric oxide (NO) is an intra- and intercellular gaseous signaling molecule with a broad spectrum of regulatory functions in biological system. Its emissions are produced by both natural and anthropogenic sources; however, soils are among the most important sources of NO. Nitric oxide plays a decisive role in environmental-atmospheric chemistry by controlling the tropospheric photochemical production of ozone and regulates formation of various oxidizing agents such as hydroxyl radical (OH), which contributes to the formation of acid of precipitates. Consequently, for developing strategies to overcome the deleterious impact of NO on terrestrial ecosystem, it is mandatory to have reliable information about the exact emission mechanism and processes involved in its transformation in soil-atmospheric system. Although the formation process of NO is a complex phenomenon and depends on many physicochemical characteristics, such as organic matter, soil pH, soil moisture, soil temperature, etc., this review provides comprehensive updates about the emission characteristics and biogeochemical transformation mechanism of NO. Moreover, this article will also be helpful to understand the processes involved in the consumption of NO in soils. Further studies describing the functions of NO in biological system are also discussed.

ACS Style

Awais Shakoor; Muhammad Abdullah; Balal Yousaf; Amina; Youhua Ma. Atmospheric emission of nitric oxide and processes involved in its biogeochemical transformation in terrestrial environment. Environmental Science and Pollution Research 2016, 1 -20.

AMA Style

Awais Shakoor, Muhammad Abdullah, Balal Yousaf, Amina, Youhua Ma. Atmospheric emission of nitric oxide and processes involved in its biogeochemical transformation in terrestrial environment. Environmental Science and Pollution Research. 2016; ():1-20.

Chicago/Turabian Style

Awais Shakoor; Muhammad Abdullah; Balal Yousaf; Amina; Youhua Ma. 2016. "Atmospheric emission of nitric oxide and processes involved in its biogeochemical transformation in terrestrial environment." Environmental Science and Pollution Research , no. : 1-20.