闽南山地卷荚相思家系造林试验     

邹顺发 《现代农业科技》2019,(24)

为了筛选出适合闽南北部山地栽培的优良卷荚相思家系,华安金山国有林场优选9个卷荚相思家系进行造林试验,对不同家系林分的生长性状、适应性和抗逆性进行对比分析。结果表明,参试家系均表现出较强的抗风性和抗寒性,可以适应闽南北部区域环境。但不同家系的树高、胸径、材积和枝下高差异显著或极显著,其中Z5和Z7家系的生长表现优于其他家系,其树高、胸径、材积、枝下高比群体均值分别提高10.80%～11.59%、11.85%～15.05%、35.62%～41.78%和10.98%～13.41%。Z5和Z7家系初步评价为优良家系,可作为卷荚相思在闽南北部推广造林的推荐材料。  相似文献   

银荆引种育苗试验   总被引：2，自引：1，他引：1  

朱洪莲  蒋小弟 《江苏林业科技》1996,23(2):35-37

报道了引种银荆过程中播种，芽移育苗，苗木生长及其抗冻性，耐涝性，病害发生情况。  相似文献   

剌槐种子萌发过程的微量热法研究     

胡云楚  周培疆 《种子》1994,(6):16-17,59

用微量热法测定了剌槐种子的萌发热谱，发现其产热规律与其吸水规律和呼吸规律相关，并获得了衡量种子活力４个参数。  相似文献   

马尖相思人工混交林试验初报     

杨绍增  王瑞荣  王达明  苏俊武 《西部林业科学》1996,(2)

根据在普文试验林场开展的马尖相思与高阿丁枫，马尖相思与西南桦行状混交（面积６．８３ｈｍ￣２）试验，４、５年时的阶段效果，从混交林的林分结构，生长状况，林分的土壤主要理化性状及其年度变化情况方面，论述了两种混交林与纯林的差异，以及不同行状混交方式间的差异。  相似文献   

几种造林措施对墨西哥柏、银荆保存率及生长的影响     

甘家生  杨卫明  陆斌  张瑾扬  高义  杜明珠  韦淑成  华秀  杨兴仁  张铨 《西部林业科学》1996,(1)

在呈贡劣质山地对墨西哥柏、银荆树植树造林进行了不同整地方式、植塘规格、种植密度、抚育方式的试验。结果：撩壕整地和水平台地的保存率及幼树生长量优于块状整地，且在阴坡深草地段尤为显著。３种植塘规格（６０ｃｍ×６０ｃｍ×６０ｃｍ，５０ｃｍ×５０ｃｍ×５０ｃｍ，４０ｃｍ×４０ｃｍ×４０ｃｍ）对墨西哥柏的保存率和高、径生长差异不显著，对银荆差异极显著，大塘优于小塘。３种种植密度（１．５ｍ×１．５ｍ，１．５ｍ×２ｍ，２ｍ×２ｍ），对幼林期的高、径生长及冠幅大小无显著影响，在３０°以上的陡坡，台地抚育优于菱形、扇形、块状抚育，与对照比较，４种抚育方式与之差异极显著。  相似文献   

马尖相思多点栽培试验阶段报告     

王达明  杨绍增  苏俊武  张荣贵  李德明  吴建明  张恩向 《西部林业科学》1996,(2)

本文报道了在景洪、普文、思茅、河口、瑞丽５个地点所同时进行的马尖相思多点栽培试验２，５年生林分的测定结果。初步证实云南北热带及南亚热带南部，年均温１８℃以上，＞１０℃积温６３００℃以上，年降水量１２００ｍｍ以上，土壤ｐＨ值４～６，无霜或偶有轻霜的地区是马尖相思的适生区。在此区域内马尖相思表现出初期速生，年平均树高生长量达１．４６～１．７２ｍ，胸径生长量１．１７～１．５３ｃｍ。育苗造林措施与幼林管理质量对其生长影响很大。  相似文献   

Reproductive and productivity traits of goats grazing Acacia cyanophylla Lindl. with and without daily PEG supplementation     

N. Lassoued  M. Rekik  H. Ben Salem  M.A. Dargouth 《Livestock Science》2006,105(1-3):129-136

A grazing experiment, conducted for 90 days compared the effect of polyethylene glycol (PEG) supplementation on postpartum reproductive traits and productivity of suckling goats grazing Acacia cyanophylla Lindl. A total of 54 native adult goats (34.4 ± 5.49 kg) were randomly allocated, 24 h after kidding, to 2 treatment groups balanced for age and the number of reared kids. Goats in both treatment groups designed C and PEG grazed in acacia for approximately 5 h every day and received each on daily basis 0.3 and 0.4 kg of hay and concentrate respectively. In addition, goats in treatment PEG were initially supplemented with 10 g/day of PEG and this supplement was then increased to 20 g /goat/day over the last 60 days of the trial. Goats receiving PEG tended (P > 0.05) to spend more time browsing acacia than those in treatment C. There were no treatment effects on live weight change of the goats, growth of their kids until 90 days of age or composition of their milk in terms of fat, protein and urea contents. Similar proportions of 74.1 and 77.8% of goats resumed postpartum ovulation with a mean ovulation rate of 1.50 ± 0.61 and 1.67 ± 0.47 (P > 0.05) in respectively the PEG and C treatments. PEG supplementation was associated with an increase (P < 0.05) in ovulation rate at the second postpartum ovulation occurring approximately 27 days after the application of the nutritional treatments (1.76 ± 0.60 versus 1.25 ± 0.45); 9 of the 13 goats ovulating in the PEG treatment were bearing more than one corpus lutuem in comparison to only 3 out of 12 females in the C group (P < 0.05). The likely increased availability of proteins in the PEG receiving goats could explain their higher ovulation rate.  相似文献   

Top 20 environmental weeds for classical biological control in Europe: a review of opportunities, regulations and other barriers to adoption   总被引：4，自引：3，他引：4  

AW SHEPPARD  RH SHAW†  & R SFORZA‡ 《Weed Research》2006,46(2):93-117

Classical biological control remains the only tool available for permanent ecological and economic management of invasive alien species that flourish through absence of their co‐evolved natural enemies. As such, this approach is recognized as a key tool for alien species management by the Convention on Biological Diversity (CBD), the European and Mediterranean Plant Protection Organization (EPPO) and the European Strategy on Invasive Alien Species (ESIAS). Successful classical biological control programmes abound around the world, despite disproportionate attention being given to occasional and predictable non‐target impacts. Despite more than 130 case histories in Europe against insect pests, no exotic classical biological control agent has been released in the EU against an alien invasive weed. This dearth has occurred in the face of increasing numbers of exotic invasive plants being imported and taking over National Parks, forests and amenity areas in this region, as well as a global increase in the use of classical biological control around the world. This paper reviews potential European weed targets for classical biological control from ecological and socioeconomic perspectives using the criteria of historical biological control success, taxonomic isolation from European native flora, likely availability of biological control agents, invasiveness outside Europe and value to primary industry and horticulture (potential for conflicts of interest). We also review why classical biological control of European exotic plants remains untested, considering problems of funding and public perception. Finally, we consider the regulatory framework that surrounds such biological control activities within constituent countries of the EU to suggest how this approach may be adopted in the future for managing invasive exotic weeds in Europe.  相似文献   

采穗圃不同营建及管理技术对马占相思穗条产量的影响   总被引：1，自引：0，他引：1  

汤加荣 《林业资源管理》2007,(6):64-66,83

通过正交试验设计研究母株不同定植株行距、不同截干高度及施用不同基肥种类对马占相思嫩枝及硬枝产穗量的影响差异。结果表明:母株以20cm×25cm定植株行距(A2)+施1 125kg/hm2硫酸钾复合肥(B2)+母株距根茎部位25cm处截干高度(C3)组合(A2B2C3)最好,对嫩枝及硬枝产穗量均最高。  相似文献   

外来树种马占相思自然繁殖更新研究   总被引：3，自引：3，他引：3  

宗亦臣  郑勇奇  张川红  刘宁 《林业科学》2006,42(7):16-20

调查马占相思人工林的自然更新情况,在国内首次发现马占相思存在种子成苗方式的自然更新.但马占相思的自然更新受立地条件制约:只有在林缘的裸露立地条件下,马占相思的种子才能萌发成苗.马占相思16年生单株在45°扇形单方向更新扩散的最远距离为17.5 m,更新繁殖的株数最多有26株;扩散距离与扩散株数之间没有明显的相关性.1987年穴状埋根造林的马占相思,其林缘更新扩散的最远距离为10.0 m,更新繁殖的株数最多有3株;1997年穴状埋根造林的马占相思,其林缘更新扩散的最远距离为3.0 m,更新繁殖的株数最多有14株.用小样方法调查马占相思人工林下乡土乔木、灌木和草本植物的自然更新.结果表明,在马占相思林分内,共发现12种乔木树种、3种灌木树种和8种草本植物,这些乡土植物均表现为生活力强.研究结果表明,马占相思在靠近水源的裸露立地条件下可以自然更新,更新的方式为种子繁殖;马占相思不影响乡土植物的正常生长.  相似文献