The use of agricultural straw for algal bloom control has been studied for more than 30 years.In this article,we have reviewed the promising potentials of using agricultural straw as source of anti-algal agents,includ...The use of agricultural straw for algal bloom control has been studied for more than 30 years.In this article,we have reviewed the promising potentials of using agricultural straw as source of anti-algal agents,including the effectiveness of each major straw type so far used in this regard,and the investigated algal species.Various pre-treatment methods have also been widely reviewed.Significant progress has been made in natural product chemistry and molecular biology with regards to agricultural straw,especially in relation to the extraction of antialgal allelochemicals,degradation processes of agricultural straws and the mechanisms through which these inhibitions occur.The development of biotechnologies using agricultural straw to successfully inhibit growth of bloom forming algae has been generally accepted as environmentally friendly.The current research status and that of the future should include isolation and discovery of antialgal allelochemicals,development of models that would illustrate the sequence of physiologic events that match the species-specific inhibitor phenomenon,and products fit in the field applications.展开更多
On the basis of expounding the status quo and using developmental trend of China's straw,4 indices are selected:straw yield,planting area,using amount of fertilizer and effective irrigation area.According to the r...On the basis of expounding the status quo and using developmental trend of China's straw,4 indices are selected:straw yield,planting area,using amount of fertilizer and effective irrigation area.According to the relevant data of China Statistical Yearbook from 1991 to 2008,by using linear regression model,we calculate China's rural straw yield,analyze the factors impacting straw yield,and point out that the using amount of fertilizer is the important factor impacting straw yield.Based on these,in the perspective of low-carbon agricultural economy,we put forward suggestions of using straw comprehensively from 4 perspectives in order to provide theoretical reference for decision-makers:improve fertilizer dependence;develop straw reuse technology;popularize the technology of straw gasification actively;strengthen farmers' low-carbon awareness.展开更多
Recycling of crop residues resources has become an urgent problem to be addressed in agriculture and rural areas of China.Compared to single use patterns of crop residues resources,crop residues circular agriculture c...Recycling of crop residues resources has become an urgent problem to be addressed in agriculture and rural areas of China.Compared to single use patterns of crop residues resources,crop residues circular agriculture characterized by multi-grade utilization and recycling is more important to improve the added value of crop residues,to enhance product market competitiveness,and to promote scale development and industrialization of crop residues recycling.This paper discussed the basic principles of the development of crop residues circular agriculture mode,and summarized five main crop residues circular agriculture mode.展开更多
Using the biogeochemical model den itrification/decomposition （DN DC）, the dynamic changes of soil organic carbon （SOC） of farmland from the 1980s to 2030s were investigated in Huantai County, a typical intensive ...Using the biogeochemical model den itrification/decomposition （DN DC）, the dynamic changes of soil organic carbon （SOC） of farmland from the 1980s to 2030s were investigated in Huantai County, a typical intensive agricultural region in the Huang- Huai-Hai Plain of China. Prior to modelling, validation of the DNDC model against field data sets of SOC from Quzhou Experimental Station in the Huang-Huai-Hai Plain was conducted at the site scale. We compared the simulated results with the observed SOC in Huantai County during 1982-2011 under two different classification methods of simulation unit （the first method integrated soil type and land use of Huantai County to form the overlapped modeling units; the second selected the 11 administrative towns as the modeling units）, and achieved a high accuracy in the model simulation with the improvement of the model parameters. Regional SOC （0-20 cm） density and stocks for Huantai County in the years 2012-2031 were predicted under different scenarios of farming management. Compared with current management practices, optimized fertilization （20% decrease of mineral N）, crop straw incorporation （90%） and appropriate animal manure input （40 kg N ha-1 yr-1） could achieve the highest level of SOC density （56.8% higher than 2011） in the period of 2012-2031. The research highlighted the importance of crop straw incorporation, optimized N fertilization and integration of crop production with ani- mal husbandry on the farmland carbon sequestration for maintaining a high land productivity in the Huang-Huai-Hai Plain.展开更多
In the research, effects of straw returning to fields on soil temperature, water, volume-weight, porosity, trace elements, and organic matters were reviewed and countermeasures were proposed to promote straw returning...In the research, effects of straw returning to fields on soil temperature, water, volume-weight, porosity, trace elements, and organic matters were reviewed and countermeasures were proposed to promote straw returning on basis of straw resources and present status in Anhui Province.展开更多
基金financially supported by the Major Science and Technology Program forWater Pollution Control and Treatment(2018ZX07208-009)the National Natural Science Foundation of China(21677122 and 21876148)+4 种基金the open fund of the Key Laboratory of Marine Eco-monitoring and Remediation Technology,Ministry of Natural Resources(MATHAB201809)the open fund of the Key Laboratory of Marine Ecosystem Dynamics,Second Institute of Oceanography,Ministry of Natural Resources(LMEB201709)Key Projects of Philosophy and Social Sciences Research,Ministry of Education(18JZD059)Fundamental Research Funds for the Central Universities(2019QNA4051)the China Scholarship Council(201806325035).
文摘The use of agricultural straw for algal bloom control has been studied for more than 30 years.In this article,we have reviewed the promising potentials of using agricultural straw as source of anti-algal agents,including the effectiveness of each major straw type so far used in this regard,and the investigated algal species.Various pre-treatment methods have also been widely reviewed.Significant progress has been made in natural product chemistry and molecular biology with regards to agricultural straw,especially in relation to the extraction of antialgal allelochemicals,degradation processes of agricultural straws and the mechanisms through which these inhibitions occur.The development of biotechnologies using agricultural straw to successfully inhibit growth of bloom forming algae has been generally accepted as environmentally friendly.The current research status and that of the future should include isolation and discovery of antialgal allelochemicals,development of models that would illustrate the sequence of physiologic events that match the species-specific inhibitor phenomenon,and products fit in the field applications.
文摘On the basis of expounding the status quo and using developmental trend of China's straw,4 indices are selected:straw yield,planting area,using amount of fertilizer and effective irrigation area.According to the relevant data of China Statistical Yearbook from 1991 to 2008,by using linear regression model,we calculate China's rural straw yield,analyze the factors impacting straw yield,and point out that the using amount of fertilizer is the important factor impacting straw yield.Based on these,in the perspective of low-carbon agricultural economy,we put forward suggestions of using straw comprehensively from 4 perspectives in order to provide theoretical reference for decision-makers:improve fertilizer dependence;develop straw reuse technology;popularize the technology of straw gasification actively;strengthen farmers' low-carbon awareness.
基金Supported by Agriculture Fund Project for Science and Technology Transformation (2009GB23260446)~~
文摘Recycling of crop residues resources has become an urgent problem to be addressed in agriculture and rural areas of China.Compared to single use patterns of crop residues resources,crop residues circular agriculture characterized by multi-grade utilization and recycling is more important to improve the added value of crop residues,to enhance product market competitiveness,and to promote scale development and industrialization of crop residues recycling.This paper discussed the basic principles of the development of crop residues circular agriculture mode,and summarized five main crop residues circular agriculture mode.
基金financially supported by the Non-profit Research Foundation for Agriculture, China (201103039)the National Natural Science Foundation of China (31261140367 and 31370527)
文摘Using the biogeochemical model den itrification/decomposition （DN DC）, the dynamic changes of soil organic carbon （SOC） of farmland from the 1980s to 2030s were investigated in Huantai County, a typical intensive agricultural region in the Huang- Huai-Hai Plain of China. Prior to modelling, validation of the DNDC model against field data sets of SOC from Quzhou Experimental Station in the Huang-Huai-Hai Plain was conducted at the site scale. We compared the simulated results with the observed SOC in Huantai County during 1982-2011 under two different classification methods of simulation unit （the first method integrated soil type and land use of Huantai County to form the overlapped modeling units; the second selected the 11 administrative towns as the modeling units）, and achieved a high accuracy in the model simulation with the improvement of the model parameters. Regional SOC （0-20 cm） density and stocks for Huantai County in the years 2012-2031 were predicted under different scenarios of farming management. Compared with current management practices, optimized fertilization （20% decrease of mineral N）, crop straw incorporation （90%） and appropriate animal manure input （40 kg N ha-1 yr-1） could achieve the highest level of SOC density （56.8% higher than 2011） in the period of 2012-2031. The research highlighted the importance of crop straw incorporation, optimized N fertilization and integration of crop production with ani- mal husbandry on the farmland carbon sequestration for maintaining a high land productivity in the Huang-Huai-Hai Plain.
基金Supported by National Water Pollution Control and Management Technology MajorProject(2013ZX07103006)Anhui Land Resource Technological Project(2012-K-18)~~
文摘In the research, effects of straw returning to fields on soil temperature, water, volume-weight, porosity, trace elements, and organic matters were reviewed and countermeasures were proposed to promote straw returning on basis of straw resources and present status in Anhui Province.
