新疆黑头鸽与布谷尔鸽形态学性状趋同性与趋异性          下载免费PDF全文

艾热提?卡衣木  米吉提.伊明江  巴雅尔塔 《现代农业科技》2024,(2)

本文通过新疆黑头鸽和布谷尔鸽品种定性性状和定量性状调查采样与统计分析,其结果如下。(1)典型的黑头鸽品种呈现头部至胸部纯黑色羽衣、胸部羽衣发出翡翠光泽,躯体和飞羽纯白色羽衣、尾羽纯黑色羽衣、前锋、和毛腿,典型的布谷尔鸽品种呈现头部、颈部、胸部、躯干、初级飞羽、次级飞羽和尾羽纯黑色羽衣,双翅膀背部为褐色夹有黑色斑点羽衣,前锋和毛腿。(2)黑头鸽嘴峰显著短于布谷尔鸽嘴峰,p=0.005,前者嘴峰显著宽于后者嘴峰,p=0.005,前者鼻宽、鼻高、鼻长均显著大于后者鼻宽、鼻高、鼻长,p≤0.022,前者喙长显著短于后者喙长,p<0.001,前者喙宽与后者喙宽差异不显著,p=0.628,前者喙高显著高于后者喙高,p=0.019,前者眼球高度与后者眼球高度差异不显著,p=0.201,前者眼球宽度显著宽于后者眼球宽度,p=0.013,前者头宽、头高与后者头宽、头高差异不显著,p≥0.234,前者头长显著短于后者头长,p=0.034。(3)黑头鸽与布谷尔鸽的初级飞羽数、次级飞羽数均为10枚。黑头鸽初级飞羽长度、次级飞羽长度、尾羽长度与布谷尔鸽初级飞羽长度、次级飞羽长度、尾羽长度之间差异不显著,p≥0.270,两者跗骨长度差异不显著,p=0.719。黑头鸽躯体显著长于布谷尔鸽,p=0.001,前者体重显著大于后者体重,p=0.023。概括起来,黑头鸽与布谷尔鸽之间头部性状、躯体长度和生物量呈现趋异化,初级飞羽和次级飞羽的数量和长度、尾羽长度和跗骨长度呈现趋同化。  相似文献   

Response of photosynthesis,growth, and acorn mass of pedunculate oak to diff erent levels of nitrogen in wet and dry growing seasons     

Krunoslav Sever  Sa?a Bogdan  ?eljko ?kvorc 《林业研究》2023,(1):167-176

The objective was to examine the effects of optimal leaf nitrogen levels> 2.0% and suboptimal levels <2.0%,nitrogen nutrition on net photo synthetic rate,stem diameter increment,height growth increment and acorn mass of pedunculate oak during 2010 in the absence of drought stress and during 2011 under the impact of moderate drought stress.According to the results,moderate drought stress significantly reduced net photo synthetic rate,stem diameter increment and height growth increment,while...  相似文献   

基于校园植物园建设的园林树木学实践教学优化     

赖灿?胡秀?蔡川?廖柏勇?郭春华 《广东园林》2024,46(1)

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Influence of fire on woody vegetation of savanna and forest formations in the Cerrado biome     

Aline das Gra?as Costa  Fillipe Tamiozzo Pereira Torres  Gumercindo Souza Lima  Fabiano Rodrigues de Melo  Carlos Moreira Miquelino Eleto Torres  Bruno Le?o Said Schettini  Vicente Paulo Santana Neto  André Luiz Lopes de Faria 《林业研究》2023,(5):1207-1216

Wildfires have environmental,economic,and social impacts,and can shape the landscape and benefit ecosystems such as the Cerrado.This study evaluated the diversity,similarity,and floristic and structural differences of woody savanna and forest formations of the Cerrado,when affected and not affected by fire.Twenty-eight 25-400m2 plots were randomly allocated and divided into Burnt Cerrado and Unburnt Cerrado,Burnt Forest,and Unburnt Forest,and divided into three levels of inclusion according to d...  相似文献   

无人机棉花脱叶关键技术及应用分析     

张新浩  毛尼亚孜?依马木  帕热提?艾山  刘燕  刘正兴  阿曼古丽?阿布都热合曼  阿孜古丽?阿布力孜 《农村科技》2022,(1):30-32

棉花催熟、脱叶是棉花采收环节中不可或缺的一项主要技术措施,其中,脱叶剂品种选择、喷施时期是否得当及喷施质量决定着脱叶效果和棉花采收质量.无人机因其独特的优势,在阿克苏地区棉花生产上的应用越来越广泛,但也存在一些问题.本文从脱叶剂选择、作业时间的确定、关键技术建议等方面总结阿克苏地区无人机棉花脱叶催熟关键技术,以供棉农参考.  相似文献   

进出境木质包装风险特征与检疫性有害生物检出通报名录[*]          下载免费PDF全文

赵凯  冯英财  艾艺  贺炜  李开银  李凤旗  孔德英  杨文友? 《现代农业科技》2022,(22)

进出境货物中木质包装传带有害生物得到国际社会普遍关注。分析进出境木质包装检疫监管政策历史变革，收集近10余年我国主要口岸进出境货物中木质包装检疫性有害生物截获报告和研究文献，分析研究其风险特征和规律，比较研究我国木质包装相关的林业检疫性有害生物与进出境木质包装检出的检疫性有害生物名录。结果显示，进境货物中木质包装检疫性有害生物昆虫和线虫检出率高，美国、马来西亚、中国台湾等国家（地区）为高风险地区，IPPC标识不规范，进境未申报或不真实；出境木质包装被进境国家检出天牛侵染，出境前未加施和伪造IPPC标识突出，出境预警量明显低于进境预警量。进境、出境和国内林业检疫性有害生物名录差异较大，初步建立了进境、出境木质包装检疫性有害生物检出通报名录，为科学、有效检疫监管提供参考资料。  相似文献   

Physiological plasticity in eucalyptus clones in the vegetative stage contributes to drought tolerance     

Vilma Marques Ferreira  Jailma Ribeiro de Andrade  Claudiana Moura dos Santos  Sebasti?o de Oliveira Maia Júnior  Jo?o Correia de Araújo Neto  Andrea Francisca da Silva Santos  Vicente Mota da Silva  Lucas Teles Bezerra  Laurício Endres 《林业研究》2023,(5):1549-1561

With the expansion of eucalyptus crops to areas with severe water limitations,physiological studies involving eucalyptus clones to identify those that are tolerant to water stress become important.The objective of this study was to assess morphological and physiological responses by eucalyptus clones subjected to drought stress and rehydration.The experiment consisted of three eucalyptus clones:VC865,I224 and I144 and two water regimes:control and water stress followed by rehydration,with six re...  相似文献   

生姜的高产栽培技术          下载免费PDF全文

司建玲?  陕西汉中洋县磨子桥镇政府?  邮编: 《现代农业科技》2022,(3)

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Litter removal impacts on soil biodiversity and eucalypt plantation development in the seasonal tropics     

Jonas Inkotte  Barbara Bomfim  Sarah Camelo da Silva  Marco Bruno Xavier Valad?o  Márcio Gon?alves da Rosa  Roberta Batista Viana  Alcides Gatto  Reginaldo S.Pereira 《林业研究》2023,(3):735-748

The little layer of tree plantations provides primary nutrients for uptake,buffers changes in soil moisture,and provides habitat and substrate to soil epigeic fauna.However,this layer in eucalypt plantations is often removed to reduce fuel load during the fire season in the Brazilian savanna(Cerrado).Therefore,it is necessary to quantify the effects of changes in litter dynamics on the function of these plantations,on key nutrient cycling processes and on epigeic fauna diversity and abundance.In...  相似文献   

Light intensity and hydrogel soil amendment differentially affect growth and photosynthesis of successional tree species     

Léo Vieira Leonel  Fabrício de Oliveira Reis  Fábio Afonso Mazzei Moura de Assis Figueiredo  Tiago Massi Ferraz  Sebasti?o de Oliveira Maia Júnior  Patrick Costa Silva  Jailma Ribeiro de Andrade 《林业研究》2023,(1):257-268

Global climate changes have increased temperatures,radiation indexes,and consequently,irregularities in rainfall in mainly tropical countries,considerably hindering plant establishment in recovering degraded areas.The objective of this study was to evaluate the growth and physiological characteristics of one species of each successional group:pioneer,secondary,and climax when subjected to different light intensities and hydrogel as a soil conditioner during rainy and dry periods.The experiment w...  相似文献