Results 31 to 40 of about 7,491 (126)
Assessing Closed Hydroponic Subsystems for Batavia Lettuce Growth Under Different Planting Densities
World Water Policy, Volume 11, Issue 2, Page 427-438, May 2025.ABSTRACT Hydroponic systems have the potential to be sustainable and alternative methods for food production that confer advantages of high production and better control of growth. However, only a few studies have focused on leafy vegetable growth in different subsystems and environmental variables.
Demet Çekin +6 more
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Shuitu Baochi Xuebao, 2011 通过田间试验方法研究了不同控氮比掺混肥(非控、半控和全控)和运筹方式(基施、基施和追施结合)在玉米种植过程中对土壤速效磷、钾养分供应及其利用率的影响。结果表明:控氮比52.5%掺混肥在基施运筹方式下,能够保证玉米各生育阶段尤其是生长发育中后期的土壤磷、钾养分供应,其磷素利用率最高,与其他控氮比掺混肥及运筹方式相比,其磷素利用率提高了2.85%～95.55%。控氮比52.5%掺混肥在基施运筹方式下,与控氮比52.5%掺混肥减量基施处理相比,钾素利用率降低了1.47%,但与其他控氮比掺混肥及运筹方式相比 ...
赵杰, 宋付朋, 高杨, 卢艳艳
doaj
China's Eco‐Civilisation, Climate Leviathan, and Hobbesian Energy Transition
Antipode, Volume 57, Issue 3, Page 830-861, May 2025.Abstract Scholars have hitherto tended to theorise China's ecological civilisation project either as a form of environmental authoritarianism or as a vision of eco‐socialism. This paper contributes to the conversation by conducting a textual analysis of Chinese scholarly discussions on eco‐civilisation.
David Chen
wiley +1 more source
Shuitu Baochi Xuebao, 2018 基于2013—2016年在吉林省永吉县、九台区、梨树县和前郭县开展的40组田间试验，通过研究稻谷产量、养分吸收量、肥料利用效率及养分平衡等指标，比较了测土配方（ST）与NE养分专家系统（NE）两种推荐施肥方法在吉林省中部一季稻区的应用效果与适用性。结果表明：农民习惯施肥（FP）处理稻谷产量平均为9.17 t/hm2，ST （9.21 t/hm2）和NE （9.24 t/hm2）处理产量均高于FP处理但并无显著差异。氮肥农学利用率以NE处理显著高于FP处理，磷肥农学利用率以ST处理显著高于FP、NE处理 ...
刘奕 +7 more
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Functional Ecology, Volume 39, Issue 2, Page 635-652, February 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Invasive plants are a major cause of the global biodiversity crisis; it is therefore crucial to understand mechanisms that contribute to their success. South‐western Australia is a global biodiversity hotspot with extremely low soil phosphorus (P) concentrations.
Dan Tang +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 不同施氮措施条件下，对保护地黄瓜生育期内氮素吸收利用效率、氮素淋洗损失进行了研究，同时也研究了不同处理对黄瓜产量及品质的影响。试验结果表明，传统施肥处理（2100kg／hm^2）与推荐施肥处理（900kg／hm^2）之间氮素吸收量没有显著差异，传统施肥处理中大量的氮肥没有用于促进黄瓜对养分的吸收利用，其氮肥利用率、农学利用率以及生理利用率都很低，每千克纯氮增产只有2．06kg，91．65％的氮素以各种途径被损失掉，其中土壤硝态氮淋洗是主要形式。同时研究发现，传统施肥处理过量氮肥施用阻碍其它营养元素的吸收，
杨治平, 陈明昌, 张强, 张建杰
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Shuitu Baochi Xuebao, 2011 阐明保水剂在道地丹参种植中的应用效果有助于保水剂在丹参节水抗旱种植中的合理应用。利用盆栽试验,比较不同保水剂用量下丹参物质形成、氮磷钾养分的吸收与利用效率的差异。结果表明,施用保水剂能促进干物质的积累与分配,增加根/冠比和丹参产量;保水剂施用降低了土壤容重,适度的土壤容重减小有助于丹参高产;不同保水剂用量下氮磷钾养分在丹参根系与地上部中的吸收分配与积累、农艺利用效率存在明显差异,过高的剂量不利于丹参的生长与养分的吸收利用,适宜剂量能显著提高丹参产量和氮磷钾肥农艺利用效率。1.2～1.8g ...
寇太记 +5 more
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Reforming the Dutch pension system to ensure sustainability
International Social Security Review, Volume 77, Issue 3, Page 99-122, July/September 2024.Abstract The Netherlands is on the brink of reforming its system of occupational pensions as part of a more general reform of its three‐pillar pension system. This reform features important changes to first pillar pension benefits. The focus of this article is however on the coming reform of occupational pensions, the second pillar of the system, which
Ed Westerhout +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2005 研究了次降雨过程中红壤小流域5种不同土地利用方式土壤N,P养分流失特征。结果表明,在降雨后,花生地、花-橘间作、橘园、板栗园和水田5种利用方式表层土壤N,P养分含量均有不同程度下降,其中花生地N,P含量下降最为明显,水田N,P含量降幅则最小;不同形态养分平均降幅依次为有效氮(5.49%)、有效磷(5.25%)、全氮(1.45%)、全磷(0.59%)。各样地地表径流中水溶态N,P养分含量花生地明显高于其他样地,而泥沙中N,P养分含量则以水田最高;各样地侵蚀泥沙中N,P养分有明显的富集现象,板栗园和橘园N ...
王晓龙 李辉信 胡锋 秦江涛 张斌
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Effects of captions on viewers’ perceptions of images depicting human−primate interaction
Conservation Biology, Volume 38, Issue 3, June 2024.Abstract Promoting human contact with wildlife can be harmful to animal conservation and welfare by exposing animals to unsafe situations and driving demand for wildlife tourism and exotic pets. Conservationists and researchers justifiably use social media to raise awareness, but professionals posting pictures of themselves with animals can have ...
Cathryn A. Freund +5 more
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