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通过连续7年田间定位试验,采用2因素试验设计,设置秸秆不还田(CK)、秸秆直接还田(ST)和秸秆炭化还田(BC)3种秸秆还田方式和0(N0),300(N300),450(N450) kg/hm23个施氮(N)量,研究秸秆直接还田和炭化还田配施氮肥对土壤碳氮含量和棉花产量的影响。结果表明:ST和BC处理土壤有机碳含量呈现逐年递增趋势,且BC处理增幅大于ST处理。第7年,在各施氮水平下,ST处理较CK处理土壤有机碳提高33.28%~36.43%,BC处理较CK处理土壤有机碳提高58.56%~63.25 ...
霍启煜 +4 more
doaj +2 more sources
稻-麦轮作体系不同施肥模式对氮肥利用效率和土壤有效养分平衡的影响
土壤肥力和养分利用效率是保障可持续粮食生产的基础。通过田间试验研究了稻—麦轮作体系下不同施肥模式氮肥利用效率和土壤有效养分的变化,结果表明:在减少养分总投入量的条件下,有机肥部分替代化肥处理(RF-OM和RF-S处理)水稻地上部总生物量显著高于LRF处理(P < 0.05),与FP处理差异不大;小麦秸秆生物量与FP和LRF处理差异均不显著,籽粒生物量及地上部总生物量与LRF处理相差不大。水稻收获期RF-OM处理地上部主要器官含氮量与LRF处理差异不显著,氮素积累总量显著高于LRF处理(P < 0.05);
左婷 +6 more
doaj
为了研究水分胁迫处理对水稻生长及产量的影响,采用盆栽试验方法,在水稻分蘖期、孕穗期、开花期和灌浆期进行水分胁迫处理,设3个处理水平,处理H 1土壤水势为0(土壤饱和含水量90%-100%),处理H2土壤水势-30 kPa,处理H3土壤水势-50 kPa,保水层作对照(CK)。结果表明,分蘖期水分胁迫影响水稻分蘖数、LA I和株高,导致单位面积有效穗数不足而严重影响产量,处理平均产量比对照低29.5%;孕穗期水分胁迫影响水稻库容的建立,穗小、穗粒数少、千粒重低而严重影响产量,处理平均有效穗数比对照少26 ...
邵玺文 +5 more
doaj +2 more sources
利用^15N同位素示踪技术研究了不同的施氮量和底追比例对小麦氮素利用和土壤硝态氮的影响。结果表明:底追比例均为5:5,处理2(纯氮施用量为168kg/hm^2)与处理1(纯氮施用量为240kg/hm^2)比较,处理2成熟期植株中土壤氮素的积累量,肥料氮的利用率均高于处理1的,但处理2的土壤硝态氮含量低;籽粒产量、蛋白质含量、湿面筋含量和面团稳定时间处理间无显著差异。纯氮施用量均为168kg/hm^2,氮肥全部用于拔节期追施的处理3与处理2比较,处理3成熟期植株中土壤氮素的积累量,籽粒蛋白质含量 ...
马兴华 +5 more
doaj +2 more sources
探明单季晚稻缓释氮肥一次性施用模式中缓释氮占总施氮量的适宜比例,为单季晚稻高效施肥提供理论指导。2019—2020年在浙江省长兴县和平镇开展田间试验。试验共设6个处理:(1)不施氮肥(N0);(2)常规施肥(U1,基肥:分蘖肥:穗肥为4:3:3);(3)常规施肥减氮12.5%(U2,比例同U1);(4)57%缓释氮一次性施用(SRU1);(5)45%缓释氮一次性施用(SRU2);(6)34%缓释氮一次性施用(SRU3)。U1的施氮量为240 kg/hm2,U2和SRU的施氮量均为210 kg/hm2 ...
张金萍 +8 more
doaj
Herbivory enhances cadmium foraging in the invasive hyperaccumulating plant Phytolacca americana
Read the free Plain Language Summary for this article on the Journal blog. Abstract Biological invasions and heavy metal pollution are two pervasive environmental challenges threatening global ecosystems. While the elemental defence hypothesis posits that certain plants accumulate heavy metals to deter herbivores, it remains unclear whether invasive ...
Jingge Kuang +5 more
wiley +1 more source
Abstract Modeling species distributions in dynamic pelagic environments remains challenging, particularly for wide‐ranging and highly mobile species when there is limited guidance on model performance. This limitation constrains the effective use of species distribution models (SDMs) in marine conservation, where robust and transferable predictions are
E. Pasanisi +32 more
wiley +1 more source
在节能减排的压力下,再造烟叶废水处理碳排放日益受到关注。再造烟叶作为烟草行业重要环节,系统评估再造烟叶废水处理站碳排放量并提出低碳运行措施对再造烟叶废水处理实现碳中和目标具有重要的指导意义。以湖北武汉某再造烟叶污水处理站为研究案例,根据《IPCC 2006年国家温室气体清单指南2019修订版》进行核算,全面分析了污水处理各环节的碳排放量。结果表明,处理量2 500 m3/d的再造烟叶废水处理站年碳排放量为10 485.3 tCO2e,吨水碳排放量为11.5 kgCO2e,预处理单元 ...
黄明 +6 more
doaj +2 more sources
Genomics‐informed management of ex situ populations
Abstract The European Association of Zoos and Aquariums (EAZA) manages insurance populations for hundreds of species through its EAZA ex situ programs (EEPs). EEPs help safeguard against extinction in the wild and provide source populations for genetic rescue programs.
Cock van Oosterhout +8 more
wiley +1 more source
Synthesis of Pollinator‐Friendly Management in European Protected Areas
Effectiveness of pollinator‐friendly management in European protected areas. Abstract Pollinators are important to humans and nature due to their role in ecosystem functioning and services. Research on the effects of pollinator management in protected areas is insufficient compared with that on farmlands and urban areas, potentially hindering ...
Gabriella Süle +45 more
wiley +1 more source

