Results 31 to 40 of about 1,203,008 (156)
Shuitu Baochi Xuebao, 2020 为明确一定养分条件下枸杞耗水量与产量的关系，于2014年和2015年采用2因素3水平对比试验设计，研究了枸杞耗水量与碱解氮消耗量耦合效应对产量的影响，通过回归的耦合模型对基于树种、树龄、碱解氮消耗量的枸杞灌溉制度进行了优化。结果表明：（1）相同施肥条件时，4年树龄时HW产量最高，为1 335.7 kg/hm2，MW产量次之，为1 174.2 kg/hm2，LW产量最低，为1 066.5 kg/hm2，5年树龄时HW产量为2 463.7 kg/hm2，MW产量最高，为2 556.1 kg/hm2 ...
马波, 田军仓
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Conservation Biology, Volume 40, Issue 4, August 2026.Abstract Bycatch in fisheries is one of the most serious threats to pelagic seabirds, causing major population declines. Mitigation measures can reduce bycatch substantially, but many fisheries fail to apply best practices, and seabird mortality remains high.
V. Warwick‐Evans +2 more
wiley +1 more source
四川大学学报. 自然科学版, 2002 根据2001和2002两年间6个月的标志重捕资料,在对分布于四川西北部若尔盖草原的青海沙蜥(Phrynocephalusvlangalii)的体长、体重和尾长3组数据进行相关分析的基础上,分别对这3组数据进行聚类分析.最后选取体长的聚类分析结果把青海沙蜥的所有个体分成3个年龄组,3个年龄组的体长范围分别是:26～36mm;37～50mm;51～65mm.各年龄组体长、体重和尾长平均值差异的F检验结果,说明用体长划分年龄较为合理.青海沙蜥种群的年龄结构基本上呈金字塔形,但第II年龄组个体数比例较小 ...
吴鹏飞 +6 more
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Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework
Conservation Biology, Volume 40, Issue 4, August 2026.Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift +8 more
wiley +1 more source
How identity bias affects perceptions of conservation messages on social media
Conservation Biology, Volume 40, Issue 4, August 2026.Abstract Public support is essential for conservation, as public opinion can influence decision‐making and policy. Therefore, understanding whether bias toward conservationists due to their identity (identity bias) affects their perceived credibility and support for their recommendations is important.
Lauren F. Rudd +4 more
wiley +1 more source
, 1997 自编了《自我概念问卷》（SCQ），对初中以上文化程度604名20—94岁成年人进行了年龄差异研究。结果表明：1．SCQ信度和效度基本合格。以因素分析法将问卷归结为（1）自我意识（SC）、（2）自觉精神状态（MS）、（3）自制与自尊（CN与SE）、（4）自我力量（ES）、（5）自觉能力（CA）五个分量表。2．CN与SE随增龄显著增强，CA随年老明显降低，MS各年龄组间无区别。SC中年组高于两老年组，ES中年组高于青年组，提示中年期是自我概念发展最佳时期，老年期尚保持相对完好的自我。3．除自我意识外 ...
孙长华 +3 more
core +1 more source
Zhongguo shiyan zhenduanxue, 2011 目的分析健康成人血清ALP活性,探讨ALP水平在成人性别和年龄的分布规律。方法随机选择2008年来吉大一院健康体检各项指标正常的健康人19416例,对其血清ALP活性进行回顾性统计分析。结果 21-50岁男性ALP值显著高于同年龄组女性 ...
吉利, 连丽丽, 孙淑艳, 孙小慧
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Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 1, Page 59-67, July 2026.ABSTRACT Objective Infertility affects up to 20% of couples in high‐income countries, which has led to an increased use of assisted reproductive technology (ART). While previous studies have linked ART to a higher risk of major congenital heart defects (CHD), less is known about the associated risk of minor CHD.
F. Kyhl‐Svart +16 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2002 目的 对不同年龄段老年性骨质疏松的诊断提供定量CT骨密度范围值。方法 用日本ST5 0 0 0TCT扫描机检测 184例 6 0～ 79岁老年腰椎 2 - 4椎体定量CT。结果 随年龄增长腰椎骨密度定量CT值下降 ,女性较男性更明显。男性 82例 ,女性 10 2例。结论 骨质疏松与年龄呈正相关 ...
韩邕, 吕全勇, 孟令辉, 张光
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Zhongguo shiyan zhenduanxue, 2020 目的探讨育龄妇女和新生儿TORCH的感染情况。方法对2012至2018年在广东医科大学附属医院接受TORCH筛查的育龄妇女和新生儿的资料进行回顾分析,统计检查结果。结果育龄妇女2012至2018年的风疹病毒、巨细胞病毒IgG抗体各年份的阳性率均高于刚地弓形虫、单纯疱疹病毒(P0.05)。育龄妇女低龄组HSVⅠ/Ⅱ-IgM阳性率高于高龄组,差异具有统计学意义 ...
刘丽琴, 黄必堂, 钟琼
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