共查询到19条相似文献,搜索用时 55 毫秒
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郯城油栗良种——“油光”选育研究 总被引:1,自引:0,他引:1
自1981年开始,利用郯城油栗这一名优种质资源,采用实生选种方法,进行了板栗良种选育研究。经过20a的选育研究,选育出了树冠开张、耐短截能力强、丰产优质的板栗良种。1999年12月通过临沂市科委鉴定,定名为“油光”板栗。 相似文献
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近几年,湖北省林木种苗管理站先后培育了160万株优质板栗良种苗,在三十个县市建造了1523hm2高标准板栗丰产示范园,其中已挂果674hm2,已开花849hm2(见附表)。初步显示出丰产、高效的势头,现将有关工作总结如下:1建立板栗良种采穗圃,严把品种质量关1990年,我们在京山县虎爪山林场,建造了303hm2采穗圃,收集了南方各省的良种102个,建品种测定林20hm2。经测定,已选出16个优良品种作为我省主要栽培品种,并建立优良品种示范园66.7hm2。从这些品种上取穗条作为接穗,保证了良种穗条的供应,确保培育出的苗木是纯优质的品种苗。2选好… 相似文献
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板栗果实营养丰富,风味甜美,为我国传统的出口产品。六合县地处宁镇扬丘陵地区,板栗栽植的历史较久,境内至今尚有百年以上的板栗大树。但由于其品种混杂,栽培粗放,造成栗实产量低而不稳,经济效益较差,影响了板栗生产的发展。为了尽快改变这一状况,从1985年起我们在竹镇林场进行了板栗优良品种的引种试验,现已建成板栗良种采穗圃50亩。通过两年的观察,已基本掌握了各品种的生物学特性和前期生 相似文献
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板栗良种丰产示范配套技术研究 总被引:1,自引:0,他引:1
在溧阳市龙河林场板栗良种基地职,深入进行了板栗的幼树丰产,低产栗园复壮及衰老树截干更新技术的丰产配套技术研究,均取和了明显的增产效果。 相似文献
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G. Bazzigher 《Forest Pathology》1981,11(4):199-207
This paper reviews initiation and execution of the selection program for blight-resistant chestnut trees in Switzerland. Important information about predisposition, resistance, and inoculation methods gained during the preliminary studies forms the basis for selection and interpretation of test results. During the last 25 years over 120000 native and Asian chestnut trees and their hybrids were tested in inoculation experiments. Now about 40000 of the selected trees are being further tested in gene banks and are being subjected to additional selection procedures. 相似文献
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本研究通过对板栗种质资源丰富的泰山的实生板栗大树进行良种选育,在对优系生长结果,栗实品质调查的基础上,通过初选、实地调查、专家复选,确定23个优系在3种不同立地条件下建优系对比园。通过各优系的生物学特性、早实丰产性、栗实品质进行对比分析,采用最大隶属度原则进行排序,筛选出综合品质前4位的5号、8号1、6和20号。筛选出的4个优系在不同立地条件上表现丰产稳产,4 a生株产在2.0kg以上,比对照石丰株产高70%~190%,平均投影面积产量在0.5 kg以上。栗实综合品质优良,单粒重在8.0g以上,红褐色或紫褐色,茸毛少或较少,富光泽,栗实整齐均匀,含糖量在18.0%以上,栗肉细、味香、糯性强,栗实品质优于石丰。 相似文献
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银杏良种具有时效性、地域性与相对性。针对目前银杏良种选育与推广工作中存在的问题,即良种概念模糊、良种选育缺乏严格的程序和相应的操作规程、良种退化日趋显现,提出了相应对策,如良种良法因种栽培、实行良种生产专业化、建立健全良种审定的权威机构、制定银杏良种标准等。 相似文献
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Marin Jei Matthew Kolp Simone Prospero Kiril Sotirovski Mark Double Daniel Rigling Mihajlo Risteski Valentina Karin‐Kujundi Marilena Idojti Igor Poljak Mirna urkovi‐Perica 《Forest Pathology》2019,49(6)
Infection of American and European chestnuts with the chestnut blight fungus Cryphonectria parasitica results in the formation of cankers, lesions caused by the growth of mycelia within bark tissue of the host plant. Infection of the fungus with Cryphonectria hypovirus 1 (CHV‐1) results in conversion of the mycelial phenotype from virulent to hypovirulent, thus allowing production of callus around cankers as a reaction by infected trees, rendering active into inactive cankers. In this study, we sampled one USA and six European chestnut stands and assessed frequency of hypovirulent C. parasitica and diversity of vegetative compatibility (vc) types present in calluses and randomly sampled cankers. Callused cankers on C. dentata at West Salem in the USA yielded significantly more hypovirulent C. parasitica isolates compared with four sampled populations on C. sativa, while all six sampled European populations did not show any statistically significant differences among themselves. We observed no correlation between hypovirulence frequencies in randomly sampled cankers and calluses, as well as no correlation of C. parasitica vc type diversity in calluses and residential populations of the fungus. Furthermore, even though we have observed calluses with more than one vc type, they do not occur regularly. Even when present in C. parasitica populations with high vc type diversity, no more than three different vc types were observed in a single callus. 相似文献
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为探讨板栗脆片增香的工艺技术,将生板栗及蒸、煮后的板栗分别切成厚度1 mm、2 mm、3 mm的板栗片,将板栗片在5个温度(160℃、180℃、200℃、220℃、230℃)进行不同时间的烘烤,再通过感官评定,研究板栗脆片的增香增色效果。结果表明:3种不同处理方式下,煮后烘烤的板栗片的增香增色效果最好,蒸后烘烤的板栗片次之,生板栗片烘烤后的效果最差,且煮后3 mm厚度板栗片在220℃、230℃烘烤25~30 min能达到最佳增香增色的效果。 相似文献