Results 41 to 50 of about 12,764 (151)
本文记述1例笼养川金丝猴幼仔“粒粒”,从出生至169日龄成功地放归笼养群体的全人工哺育技术,同时对幼仔个体行为与母乳哺育幼仔进行了对比观察,结果表明:(1)以优质人工乳哺育金丝猴幼仔,补加适量维生素和活性钙,于111日龄添加固体食物以后,随着日龄增长哺乳量递减,固体食物的种类、数量逐渐增加,206日龄断奶,幼仔健康成活;(2)主要护理技术为育幼期严格调控育幼箱内温、湿度,适度通风、日照,严格消毒和保育人员的精心爱抚:(3)20日龄开始社群行为驯化,145日龄开始放归训练,并逐渐延长放归时间 ...
梁冰
doaj
Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source
婴幼儿早期教育是对婴幼儿进行心理培养、心理锻炼和进行早期智力开发的总称.幼儿潜在能力的发挥,从一生下来就开始了,这种教育就象人体的发育需要营养一样,人脑的发展也需要刺激、启发和诱导,这些都需要通过早期教育来实现.幼儿时期是人一生中最敏感的时期在这个时期如果缺乏教育,日后就很难弥补过来.因此,现代家庭对婴幼儿的早期教育极为重视.
刘颖
doaj
为探究生物结皮发育驱动下土壤水蚀特征及机理,选取苔藓发育为优势种的退耕样地,设计5个盖度等级(1%~20%,20%~40%,40%~60%,60%~80%,80%~100%),以裸地为对照,在不同水流剪切力(6.12~19.64 Pa)下进行冲刷试验。结果表明:结皮发育显著影响土壤养分含量,且高盖度结皮覆盖下养分表聚效应更加明显。生物结皮发育显著影响土壤分离能力,裸地土壤分离能力为生物结皮的3.58~348.95倍,裸地细沟可蚀性(0.293 5 s/m)为生物结皮(0.001 0~0.082 2 s ...
平原 +6 more
doaj
ABSTRACT Net photosynthetic rate (Pn) serves as a key indicator for evaluating plant growth and yield. In order to explore an effective method for monitoring winter rapeseed Pn using unmanned aerial vehicle (UAV) multispectral technology, the winter rapeseed was taken as the research object and the multispectral images were obtained through UAVs in ...
ChengYang Ni +7 more
wiley +1 more source
从2014年7月到2017年7月,杭州动物园饲养的7只赤大袋鼠母兽,共繁殖了13只仔兽,7只存活,6只死亡。在此期间,从这7只母兽中选择3只进行育儿袋检查、育儿袋测温的行为训练,观察到1只仔兽的降生过程,对8只仔兽在育儿袋内的生长过程进行定时检查和拍照记录。结合另外3只母兽的繁育情况,对赤大袋鼠仔兽的生长发育特别是袋内的发育进行了初步的研究。对离袋的3仔兽进行测重行为训练,记录体重增长数据。结果发现育儿袋的温度在34.6~35.4 ℃,在圈养条件下仔兽开眼日龄在120~130 d ...
罗坚文 蒋国红 唐 宁 吴国平 杨 洁
doaj
First confirmed breeding of the Brown Hornbill in China, documented through cooperative feeding in Shangyong Protected Area. ABSTRACT The Brown Hornbill (Anorrhinus austeni), a Near Threatened frugivore, reaches the northern edge of its distribution in southern Yunnan, China, yet breeding had not been previously documented with site‐attributed nests in
Junsong Li +8 more
wiley +1 more source
胚胎和幼体生活史的基础信息对于受威胁两栖类物种的保护至关重要。本研究在野外环境下对安吉小鲵(Hynobius amjiensis)的胚胎与幼体发育进行了详细观察,记录了其胚胎和幼体发育的各个阶段以及幼体间的形态变异。结果显示:安吉小鲵的胚胎发育共分为21个阶段,平均发育时长为34. 4 d;幼体发育分为10个阶段,平均发育时长为125.
黄镇杨 +8 more
doaj +2 more sources
Influence of touching on growth and development of very low birth weight infants
[目的]观察抚触对极低体重儿生长发育的影响。[方法]选择42例极低体重儿,随机分为抚触组和对照组,抚触组给予正规的抚触,观察两组治疗后7d、14d相同时段的喂养耐受情况,同时记录达到全肠道喂养的时间及治疗后10d内体重、身长、头围增长和纠正胎龄40周进行2 0项新生儿行为神经测定,并做组间比较。[结果]抚触治疗后7d、14d抚触组喂养不耐受的发生率比对照组明显降低(P
富林宝
doaj
Growing Demand and Uneven Supply: Eight Years of Nature Education in China 需求增长与供给不均:中国自然教育八年发展回顾
ABSTRACT This study examines the role of nature education in advancing conservation and sustainability in China between 2014 and 2023. Drawing on national survey reports and historical–comparative methods, it analyses the dynamics of public demand, institutional supply, and practitioner capacity.
Qi Yunxi, Lyu Xiang, Huang Yu
wiley +1 more source

