马尾松种源苗期抗寒性研究

This paper is dealt with genetic variation of cold tolerance of ten representative of seed sources of masson pine which were raised and planted at three locations,Tonglu of Zhejiang,Liuan of Anhui and Tongbo of Henan.The results showed that there existed marked interprovenance variations and no significant intraprovenance variations for relative freezing damage and bud set index of seedlings at all three sites.Electroconductivities of the southern,central and northern seed sources were found to performed various change patterns under different low temperature treatments or different treatment duration at the same low temperature.The correlation analysis indicated that the electroconductivities were strongly and positively related to relative freezing damage and negatively to bud set index.The high and negative correlation was be evident between relative freezing damage and bud set index.The estimated broad heritabilities of freezing damage and bud set index were 0.76～0.86 and 0.59～0.63 respectively.

欧洲榛子引种栽培研究

欧洲榛子引种到江淮丘陵生长发育正常，3年生开始结实，5年生有一定产量，筛选出的8个优良品系7年生幼林坚果产量750kg/hmm2以上．坚果的主要经济性状接近或达到原产地的栽培品种标准。

欧洲榛子平茬促萌试验

欧洲榛子平地平茬与距地面 10 cm处平茬相比 ,>30 cm萌条数前者占总萌条数的 5 2 .1% ,后者仅占 34.2 %

浅析马尾松二代加密实生种子园营建与管理

马尾松是我国亚热带地区的重要造林先锋树种，其造林成本低，天然更新容易，经济价值高，有“一林多用”、“一树种多林种”的特点，因此，具有良好的造林前景。由于马尾松在广泛而复杂的地理条件下，通过漫长时期的生殖隔离和长期的自然选择，形成了多样的地理种源，而这些不同的地理种源在形态特征、生物学特性和生产力等方面表现出了明显的差异。所以，选择优良种源，营建马尾松实生种子园，繁育良种，是营造马尾松速生丰产林的重要途径。

银杏育苗的实践与体会

<正> 1996年,六安市林木良种场在6个作业区培育银杏苗木7.4亩,出苗117827株,平均每亩产苗量达15923株;当年苗平均高21.7cm,平均地径0.55cm,苗木生长茁壮,根系发达。为总结经验教训,12月份于圃地逐块进行了苗木状况调查,并结合各项生产技术措施进行其分析比较,结果认为种子处理、整地作床。