检索结果-南通市图书馆

Mitigation strategies for soil acidification based on optimal nitrogen management

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and Engineering 2024年第2期11卷 229-242页

作者： Pengshun WANG Donghao XU prakash lakshmanan Yan DENG Qichao ZHU Fusuo ZHANG College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China National Academy of Agriculture Green Development China Agricultural UniversityBeijing 100193China Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin College of Resources and EnvironmentSouthwest UniversityChongqing 400716China Sugarcane Research Institute Guangxi Academy of Agricultural SciencesNanning 530007China Queensland Alliance for Agriculture and Food Innovation University of QueenslandSt Lucia 4067BrisbaneQueenslandAustralia

Soil acidification is a serious constraint to food production *** review explores its primary causes,with a focus on the role of nitrogen fertilizer,and suggests mitigation strategies based on optimal N *** acidification is determined by the leaching of weak acid mainly caused by climate and soil conditions,whereas the use of ammonium-based fertilizers,nitrate leaching and removal of base cations(BCs)by crop harvesting mostly accounts for anthropogenic *** addition,low soil acid buffering capacity,mainly determined by soil parent materials and soil organic matter content,also accelerates *** study proposes targeted mitigation strategies for different stages of soil acidification,which include monitoring soil carbonate content and p H of soils with p H>6.5(e.g.,calcareous soil),use of alkaline amendments for strongly acidic soils(p H<5.5)with aluminum toxicity risk to p H between 5.5 and 6.5,and decreasing acidification rates and supplementing BCs to maintain this optimal p H range,especially for soils with low acid buffering *** mitigation involves optimizing the rate and form of N fertilizers used,regulating N transformation processes,and establishing an integrated soil–crop management system that balances acid production and soil buffering capacity.

关键词： Soil acidification nutrient management nitrogen soil buffering capacity

Greenhouse gas emissions mitigation and economic viability of sugar crops in China

在线全文

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and Engineering 2024年第3期11卷 397-408,I0004页

作者： Linsheng YANG Xiaozhong WANG Wushuai ZHANG prakash lakshmanan Yan DENG Xiaojun SHI Xinping CHEN Fusuo ZHANG Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin College of Resources and EnvironmentSouthwest UniversityChongqing 400716China Key Laboratory of Low-carbon Green Agriculture in Southwestern China(Ministry of Agriculture and Rural Affairs) Southwest UniversityChongqing 400716China Rice Research Institute Anhui Academy of Agricultural SciencesHefei 230031China Key Laboratory of Sugarcane Biotechnology and Genetic Improvement(Guangxi) Ministry of Agriculture and Rural AffairsGuangxi Key Laboratory of Sugarcane Genetic ImprovementGuangxi Academy of Agricultural SciencesSugarcane Research InstituteGuangxi Academy of Agricultural SciencesNanning 530007China Center for Resources Environment and Food SecurityChina Agricultural UniversityBeijing 100193China

Climate change mitigation is a major challenge of human ***,to this end,many countries including China are committed to achieving carbon neutrality within a few *** is a major sugarcane and sugar beet producing country and has one of the largest carbon footprint for sugarcane and sugar beet production globally.A comprehensive study was conducted on sugarcane and sugar beet crops grown in China for greenhouse gas(GHG)emissions mitigation potential,economic crop production from a sustainable sugar production ***-term trend analysis showed that yield and GHG emissions of sugarcane and sugar beet crops increased but the ratio of income to cost *** equation model analysis revealed nitrogen fertilizer and labor as the major drivers of GHG emissions for both sugarcane and sugar *** sugarcane and sugar beet,the path coefficient of N fertilizer were‒0.964 and‒0.835 and that of labor were 0.771 and 0.589,*** transitioning the current cropping system to an improved model with optimized labor,N input and machinery use,the GHG emissions and total annual cost of sugarcane and sugar beet production can be reduced by 32%and 24%,respectively,by 2030,compared to a business-as-usual *** is the first integrated and comparative study of environmental and economic sustainability of sugarcane and sugar beet production in *** findings will enable all stakeholders of Chinese sugarcane and sugar beet industries to transform them into environmentally and economically sustainable sugar production.

关键词： Economic profits GHG emissions labor input nitrogen input sugar

Multiple pollutants from crop and livestock production in the Yangtze River: status and challenges

在线全文

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and Engineering 2024年第1期11卷 134-139,I0005页

作者： Lihua MA Shiyang LI Linfa FANG Xuanjing CHEN Ran XIAO Xiaoxuan SU Zhaolei LI Zhaohai BAI Lin MA prakash lakshmanan Xinping CHEN Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin College of Resources and EnvironmentSouthwest UniversityChongqing 400715China Water Systems and Global Change Group Wageningen University&Research6708 PB Wageningenthe Netherlands Key Laboratory of Agricultural Water Resources Center for Agricultural Resources ResearchInstitute of Genetic and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021China Key Laboratory of Sugarcane Biotechnology and Genetic Improvement(Guangxi) Ministry of Agriculture and Rural AffairsGuangxi Key Laboratory of Sugarcane Genetic ImprovementSugarcane Research InstituteGuangxi Academy of Agricultural SciencesNanning 530007China Queensland Alliance for Agriculture and Food Innovation University of QueenslandSt Lucia 4067Australia

The rapid increase in the proportion of cash crops and livestock production in the Yangtze River Basin has led to commensurate increases in fertilizer and pesticide inputs. Excessive application of chemical fertilizer, organophosphorus pesticides and inappropriate disposal of agricultural waste induced water pollution and potentially threaten Agriculture Green Development(AGD). To ensure food security and the food supply capacity of the Yangtze River Basin, it is important to balance green and development, while ensuring the quality of water bodies. Multiple pollutants affect the transfer, adsorption, photolysis and degradation of each other throughout the soil-plant-water system. This paper considers the impact of multi-pollutants on the nitrogen and phosphorus cycles especially for crops, which are related to achieving food security and AGD. It presents prospective on theory, modeling and multi-pollutant control in the Yangtze River Basin for AGD that are of potential value for other developing regions.

关键词： Agriculture Green Development crop production livestock production multi-pollutant models multiple pollutants Yangtze River Basin

SUSTAINABLE SUGARCANE CROPPING IN CHINA

在线全文

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and Engineering 2022年第2期9卷 272-283页

作者： Ting LUO prakash lakshmanan Zhongfeng ZHOU Yuchi DENG Yan DENG Linsheng YANG Dongliang HUANG Xiupeng SONG Xihui LIU Wen-Feng CONG Jianming WU Xinping CHEN Fusuo ZHANG Key Laboratory of Sugarcane Biotechnology and Genetic Improvement(Guangxi) Ministry of Agriculture and Rural AffairsGuangxi Key Laboratory of Sugarcane Genetic ImprovementSugarcane Research InstituteGuangxi Academy of Agricultural SciencesNanning 530007China Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin College of Resources and EnvironmentSouthwest UniversityChongqing 400716China Queensland Alliance for Agriculture and Food Innovation University of QueenslandSt Lucia 4067QLDAustralia Center for Resources Environment and Food SecurityChina Agricultural UniversityBeijing 100193China

Demand for sugar is projected to grow in China for the foreseeable ***,sugarcane production is unlikely to increase due to increasing production cost and decreasing profit *** persisting sugarcane yield plateau and the current cropping system with fertilizer overuse,soil acidification and pests and diseases remain the major productivity *** agriculture supports the livelihood of about 28 million farmers in South China;hence,sustaining it is a socioeconomic *** compellingly,to meet the ever-increasing Chinese market demand,annual sugar production must be increased from the current 10 Mt to 16 Mt by 2030 of which 80% to 90% comes from ***,increasing sugar yield and crop productivity in an environmentally sustainable way must be a *** review examines the current Chinese sugarcane production system and discuss options for its transition to a green,sustainable cropping system,which is vital for the long-term viability of the *** analysis shows that reducing chemical inputs,preventing soil degradation,improving soil health,managing water deficit,provision of clean planting material,and consolidation of small farm holdings are critical requirements to transform the current farming practices into an economically and environmentally sustainable sugarcane cropping system.

关键词： sustainable sugarcane cropping soil health rotation and intercropping soil acidification

具有固氮和耐酸特性甘蔗属野生割手密的筛选与鉴定

在线全文

学校读者我要写书评

暂无评论

西南农业学报 2022年第12期35卷 2700-2707页

作者：梁宏卫 prakash lakshmanan 刘晓燕黄柯钧颜睿罗霆广西农业科学院甘蔗研究所/广西甘蔗遗传改良重点实验室/农业农村部广西甘蔗生物技术与遗传改良重点实验室南宁530007 广西博庆食品有限公司广西宜州546300

【目的】开展甘蔗属野生割手密种质资源农艺性状和固氮能力评价鉴定,筛选兼具固氮和耐酸特性的特异种质,为我国甘蔗属野生割手密种质资源创新和品种选育提供参考依据。【方法】以33份甘蔗属野生割手密种质为试验材料,采用相关分析、聚... 详细信息

【目的】开展甘蔗属野生割手密种质资源农艺性状和固氮能力评价鉴定,筛选兼具固氮和耐酸特性的特异种质,为我国甘蔗属野生割手密种质资源创新和品种选育提供参考依据。【方法】以33份甘蔗属野生割手密种质为试验材料,采用相关分析、聚类分析和基因组克隆等方法,测定其株高、总茎数、锤度、干物率和固氮酶活性,克隆其内生固氮菌nifH基因,分析其固氮酶活性及酸胁迫下的根重和根系活力等指标,筛选出综合性状优良的固氮割手密材料,最终鉴定出兼具固氮和耐酸特性的割手密种质。【结果】参试割手密种质遗传多样性丰富,株高、总茎数、锤度、干物率和固氮酶活性的平均变异系数分别为31.73%、37.22%、40.69%、6.77%和59.22%,其中固氮酶活性的变异最大,说明这些割手密种质中存在固氮能力变异丰富的类型。相关分析结果表明,干物率与锤度、固氮酶活性与总茎数呈显著正相关(P<0.05,下同),干物率与总茎数呈显著负相关。聚类分析结果表明,在欧式距离8.51处可将33份割手密种质划分为4个类群,聚类结果与种质本身特性具有一定的一致性,其中,第4类群中的6份割手密种质为多茎的高固氮组合,第3类群的4份割手密种质均具有植株矮小和干物率低的特点;根据地域来源对33份割手密种质不能明显聚类,但具有较多相同性状特征的种质能聚在一起,说明割手密种质的表型和固氮能力在长期演化和自然选择过程中发生了显著变化。在种质GSM177和GSM03体内克隆到大量具有固氮基因nifH的固氮菌,进一步证实GSM177和GSM03是固氮型割手密种质。耐酸筛选试验结果表明,种质GSM177和GSM03对酸性土壤的耐受程度存在明显差异,其中,种质GSM177较能耐受酸性土壤环境,GSM03是典型的酸敏感型割手密种质。【结论】GSM177是兼具固氮和耐酸特性且综合性状优良的甘蔗属野生割手密种质资源,可在固氮和耐酸甘蔗品种选育中利用。

关键词：甘蔗野生割手密固氮耐酸鉴定筛选

Sonographic Evaluation of Pleural Effusion

在线全文

学校读者我要写书评

暂无评论

Open Journal of Medical Imaging 2017年第3期7卷 77-88页

作者： Ajit Kumar Reddy Sandeep Ballal Kaup Annitha Elavarasi Jayamohan prakash Manikka lakshmanan Krishnappa Nasappa Antony Jean Department of Radiodiagnosis KIMS Bangalore India Department of Radiodiagnosis HOSMAT Bangalore India Department of Radiodiagnosis MGMCRI Pondicherry India Department of Radiodiagnosis Aarthi Scans Tirunelveli India

Background: Although at times small amounts of pleural fluid is detected on the lateral decubitus chest radiograph, this may be impossible to obtain in severely ill patients. Because of its ready availability and ability for bedside imaging, ultrasonography has become a crucial imaging modality not only in detecting the presence of pleural fluid but also as a guide to aspiration. Aims: To sonographically determine the nature of pleural effusions. To analyze predictability of both benign and malignant pleural effusions and to study statistical value of various ultrasound characteristics in differentiating exudative and transudative as well as benign and malignant effusions in correlation with thoracocentesis. Material and Methods: Sonographic feature as well as fluid cytology was evaluated. Following categorization into exudates or transudate as well as benign or malignant the diagnosis was then correlated biochemically. Results: Transudates were anechoic, while an anechoic effusion may be either a transudate or an exudate. Complex septation, internal echoes, thickened pleura or homogeneously echogenic patterns were always exudates. Sonographic findings of pleural nodules and associated parenchymal lesions in the lung and liver were indicative of malignancy. Conclusions: Ultrasound in addition to being highly sensitive for pleural effusion also aided in characterizing the nature and minimizing the complications during thoracocentesis. Pleural effusions were categorized into exudates and transudate as well as benign and malignant with a certain degree of confidence based on sonographic findings.

关键词： Pleural Effusion Sonography Septation Internal Echoes Thoracocentesis

有机肥配施下抗生素对紫色土坡面C、N流失特性的影响

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

土壤学报 2024年

作者：冯桦方林发吴昌杰肖然郎明邓燕 prakash lakshmanan 马黎华李兆磊张福锁陈新平西南大学资源环境学院长江经济带农业绿色发展研究中心广西农业科学院甘蔗研究所广西甘蔗遗传改良重点实验室农业农村部甘蔗生物技术与遗传改良重点实验室(广西) 昆士兰大学昆士兰农业和食品创新联盟中国农业大学资源与环境学院国家农业绿色发展研究院

有机肥替代是实现农业废弃物资源化利用的有效途径，但畜禽排泄物中的抗生素会对微生物介导的土壤碳（C）和氮（N）过程产生影响，水力侵蚀过程中抗生素残留对土壤C、N流失的叠加效应并不明确。本文以西南地区坡耕地典型紫色土为研究对... 详细信息

有机肥替代是实现农业废弃物资源化利用的有效途径，但畜禽排泄物中的抗生素会对微生物介导的土壤碳（C）和氮（N）过程产生影响，水力侵蚀过程中抗生素残留对土壤C、N流失的叠加效应并不明确。本文以西南地区坡耕地典型紫色土为研究对象，分析有机肥配施下抗生素对紫色土坡面侵蚀以及C、N流失特性的影响。结果表明：（1）有机肥配施显著降低了坡面产流产沙量以及土壤总有机碳（TOC）、全氮（TN）的侵蚀损失量。（2）土壤抗生素暴露对有机肥减蚀无显著影响，其中土霉素（OTC）以径流损失为主，恩诺沙星（ENR）以沉积物损失为主。（3）土壤抗生素暴露对土壤C流失的影响不显著，但显著加剧了土壤N的流失。抗生素改变了土壤和侵蚀沉积物的微生物群落结构，这可能是导致侵蚀过程中土壤N流失增加的主要原因。（4）这两种抗生素对土壤C、N流失的影响不同，ENR浓度与土壤TOC和硝态氮（NO3--N）的损失浓度存在显著正相关关系。与不含抗生素的有机肥配施相比，抗生素OTC和ENR增加了土壤C、N流失比例，分别为0.80%～2.94%和22.77%～37.73%。综上，有机肥配施可以实现减少坡耕地水土流失和养分流失的效果，但侵蚀过程中伴随抗生素的暴露会显著增加土壤N流失的风险。

关键词：有机肥替代抗生素水力侵蚀土壤碳流失土壤氮流失

不同土壤调节剂(肥料)对甘蔗宿根黄化的防效及甘蔗生长和产量的影响

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

西南农业学报 2022年第3期35卷 564-570页

作者：罗霆吴建明闫海锋邓宇驰 prakash lakshmanan 丘立杭陈荣发范业赓周慧文黄柯钧黄杏周忠凤广西农业科学院甘蔗研究所/广西甘蔗遗传改良重点实验室/农业农村部广西甘蔗生物技术与遗传改良重点实验室南宁530007

【目的】分析不同土壤调节剂(肥料)对甘蔗宿根黄化的防治效果及甘蔗生长和产量的影响,为甘蔗宿根黄化的大面积高效低成本防治提供参考依据。【方法】采用随机区组设计,在2020年第1年宿根蔗地中设6个土壤调节剂(肥料)处理[处理A为出苗3... 详细信息

【目的】分析不同土壤调节剂(肥料)对甘蔗宿根黄化的防治效果及甘蔗生长和产量的影响,为甘蔗宿根黄化的大面积高效低成本防治提供参考依据。【方法】采用随机区组设计,在2020年第1年宿根蔗地中设6个土壤调节剂(肥料)处理[处理A为出苗3叶左右时叶面喷施铁肥,处理B为出苗前土施硫酸亚铁10.0 kg/667 m^(2),处理C为出苗前土施熟石灰20.0 kg/667 m^(2),处理D为出苗前根区土壤淋灌修复菌剂500.0 g/667 m^(2)(稀释3000倍),处理E为出苗前土施生物炭1.0 t/667 m^(2);处理F为出苗前土施糖厂煤灰1.0 t/667 m^(2)],以不作任何处理为对照(CK),处理后70 d统计当年(2020年)的黄化发生率和第2年宿根苗期的黄化发生率,并对比株高、分蘖率和叶片数等农艺性状及有效茎数和茎径等产量指标与CK的差异,比较不同土壤调节剂(肥料)处理对甘蔗宿根黄化的防治效果。【结果】各供试土壤调节剂(肥料)对甘蔗宿根黄化均具有极显著的防治效果(P0.05),但均极显著差于其他土壤调节剂(肥料)处理;在2021年,各土壤调节剂(肥料)处理间的防治效果均存在极显著差异,且显著(PA>F>C>D>B。【结论】叶面喷施含Fe^(2+)叶面肥对当年已发生的甘蔗宿根黄化具有显著复绿作用,能快速挽回甘蔗宿根黄化引起的产量损失,但无法从根本上防治甘蔗宿根黄化。综合考虑防治成本及对蔗苗生长和甘蔗产量的影响,生产上以土施糖厂煤灰1.0 t/667 m^(2)对甘蔗宿根黄化的防治效果及对甘蔗前期生长和后期产量的促进作用效果较佳。

关键词：甘蔗宿根黄化防治效果农艺性状产量成本分析

维普期刊数据库博看期刊

Prediction of Shear Bond Strength of Asphalt Concrete Pavement Using Machine Learning Models and Grid Search Optimization Technique

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2025年第1期142卷 691-712页

作者： Quynh-Anh Thi Bui Dam Duc Nguyen Hiep Van Le Indra prakash Binh Thai Pham Civil Engineering Department University of Transport Technology54 Trieu KhucThanh XuanHanoi100000Vietnam DDG(R)Geological Survey of India Gandhinagar382010India

Determination of Shear Bond strength(SBS)at interlayer of double-layer asphalt concrete is crucial in flexible pavement *** study used three Machine Learning(ML)models,including K-Nearest Neighbors(KNN),Extra Trees(ET),and Light Gradient Boosting Machine(LGBM),to predict SBS based on easily determinable input ***,the Grid Search technique was employed for hyper-parameter tuning of the ML models,and cross-validation and learning curve analysis were used for training the *** models were built on a database of 240 experimental results and three input variables:temperature,normal pressure,and tack coat *** validation was performed using three statistical criteria:the coefficient of determination(R2),the Root Mean Square Error(RMSE),and the mean absolute error(MAE).Additionally,SHAP analysis was also used to validate the importance of the input variables in the prediction of the *** show that these models accurately predict SBS,with LGBM providing outstanding ***(Shapley Additive explanation)analysis for LGBM indicates that temperature is the most influential factor on ***,the proposed ML models can quickly and accurately predict SBS between two layers of asphalt concrete,serving practical applications in flexible pavement structure design.

关键词： Shear bond asphalt pavement grid search optimization machine learning