Results 31 to 40 of about 1,594 (153)
ブラジル・南パンタナールの伝統的な農場経営とその課題 : バイアボニータ農場の事例 [PDF]
, 2009 ブラジル南パンタナールのバイアボニータ農場では，天然草地の放牧地に依存した，肥育用の仔ウシ生産を目的とする仔取り繁殖経営が中心に営まれている。ここでは，季節的な河川の水位変化に起因して発現する多様な天然草地の状況に合わせて牛群を管理したり，火入れや伐採・巻き枯らしにより草地の森林化を抑制したりするなど，農場間の相互扶助システムとともに，パンタナールで培われてきた牧畜経営のワイズユース（wise use）が現在も継承されている。しかし，農場規模が小さいうえに，労働力不足，ウシの受胎率の低さ ...
KOJIMA Ana Yimiko +5 more
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Advocacy strategies in state preemption: The case of energy fuel bans
Policy Studies Journal, Volume 52, Issue 2, Page 257-282, May 2024.Abstract Interest group literature suggests reformer advocacy groups, seeking policy change and innovation, are more likely to secure policy victory in local government. Entrenched advocacy groups, favoring current policies, are better suited to win policy battles at the state level.
Cory L. Struthers, Cary Ritzler
wiley +1 more source
Shuitu Baochi Xuebao, 2004 针对黑河下游额济纳旗天然林草植被面积不断减少、生态环境日趋恶化的问题，采用实地调查和收集相关调研成果相结合的方法，在初步查明天然林草植被现状及存在问题、分析退化原因的基础上，经过探讨认为，额济纳旗天然林草植被的保护途径主要包括：大力推行围栏封育，按照草场的载畜能力调节载畜量，增加供水量、扩大灌溉面积，适当发展人工林草，建设人工小生物圈等。
陈江南 李会安 钟思励 黄福贵 詹子胜 伊绍强
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People and Nature, Volume 6, Issue 2, Page 573-585, April 2024.Abstract Tibetan Buddhist monasteries are widely distributed throughout the Qinghai–Tibet Plateau and are significant locations for human–wildlife coexistence. Given the significance of their historical and contemporary social influence, it is crucial to ascertain whether there exists a non‐negligible correlation between these monasteries and their ...
Gesang Wangjie +6 more
wiley +1 more source
A case study of policies to intervene in pastoralism by Inner Mongolian local [PDF]
, 2015 平成26年度科学研究費補助金基盤S「乾燥地災害学の体系化研究」（研究代表者：篠田雅人）の成果の一部departmental bulletin ...
1000000315392 +3 more
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Engaging learners in online learning without external incentives: Evidence from a field experiment
Information Systems Journal, Volume 34, Issue 1, Page 201-227, January 2024.Abstract Online learning platforms increase opportunities for learners to participate in learning out of interest, without any external incentives such as fulfilling requirements for degree programmes or certificates. However, such forms of online learning often suffer from low sustained learning engagement.
Jiayuan Zhang, Cheng Yi, Jiayin Zhang
wiley +1 more source
Shuitu Baochi Xuebao, 2021 干旱、半干旱区植被恢复与重建对降雨具有高度的依赖性，降雨格局的任何细微变化对其生态系统均会产生影响。以宁夏盐池县荒漠草原3种主要覆被类型（浮沙地、天然草地和柠条林地）为研究对象，使用自动气象站、土壤水分仪连续监测2015—2017年降水量和土壤水分数据，分析了3种覆被类型0—250 cm土层的土壤水分动态及其对不同量级降水的响应。结果表明：浮沙地土壤水分从表层至深层为增长趋势，天然草地和柠条林地为增加—减少—增加趋势；水分季节变化分为土壤水分稳定期（12月至翌年2月）、土壤水分积累期（3—5月 ...
陈娟 +4 more
doaj
Evaluation of Nutritional Value of Four High-Sugar Ryegrass Varieties on the Loess Plateau under Different Cutting Methods [PDF]
To explore the effects of cutting methods on the nutritional value of different high-sugar ryegrass, four high-sugar ryegrass varieties, namely ‘AberStar’ ‘AberMagic’ ‘AberAvon’ and ‘Premium’ were planted in the Loess Plateau.
Chang, Sheng Hua +8 more
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Shuitu Baochi Xuebao, 2007 土壤厚度是土壤肥力存在和植物生长的重要物质基础.本文调查了内蒙古东部地区多伦、锡林浩特和巴林左旗3个长期保护天然草地的土壤厚度和植被盖度等植物生长状况.结果表明,天然草地植被盖度、地上生物量和高度随土壤厚度的增加而增大.当土壤厚度小于20 cm时,植被盖度和地上生物量随土壤厚度的降低急剧减小,当土壤厚度小于10 cm时,植被类型为非地带性植被,盖度小于30%,地上生物量小于150 g/m2;当土壤厚度大于20 cm后,植被盖度一般大于80%,地上生物量接近或大于200 g/m2,而且土壤厚度大于20 ...
王志强, 刘宝元, 海春兴
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