排序方式: 共有12条查询结果,搜索用时 15 毫秒
1.
2.
南方红豆杉容器苗含水率及生物量分配规律研究 总被引:1,自引:0,他引:1
以1、2、3年生南方红豆杉容器苗为研究对象,研究其在不同年龄各构件的含水率及生物量的分配格局。结果表明,南方红豆杉容器苗各构件生物量随着年龄增加逐渐增加,3年生南方红豆杉容器苗各构件生物量远大于1、2年生苗,各构件生物量分配大小表现为叶根干枝;苗高与地径,苗高、地径与干、枝、叶、根生物量以及地上、地下和全株生物量都具有极显著相关关系;除了枝含水率先减少后增加外,其余南方红豆杉构件的含水率都随着年龄的增加而逐渐降低。地上、地下部分含水率与地上、地下部分、全株生物量都呈负相关。 相似文献
3.
4.
采用正交设计开展了珍贵用材树种江南油杉(Keteleeria cyclolepis)无纺布轻基质容器育苗试验,研究了容器规格(高度)、缓释基肥施入量、基质配比3个因子对江南油杉苗木质量的影响.结果表明:不同的容器规格、基质配比和缓释肥施入量对江南油杉的苗高、基径和高径比等3个苗期主要性状有较显著的影响(除基质配比对基径影响较小外);各组合处理间也有较显著差异,以5号处理组合苗木生长最好,苗高、基径和高径比平均值分别为18.83 cm、0.261 cm和72.23,其次是6号、3号和2号处理组合.采用直径为5 cm的无纺布容器袋育苗时,无纺布容器袋的长度为10 cm,基质配比可选用本试验所用基质即锯木屑:泥炭:炭化谷壳体积比为4:4:2,也可根据当地实际选用本基地的配比,基质中缓释基肥施入量3 kg/m3,育苗密度控制在220-230株/m2,可以生产出优质壮苗. 相似文献
5.
6.
7.
薄壳山核桃嫁接技术试验 总被引:9,自引:0,他引:9
通过对不同种子培养的砧木,采用不同的砧木和接穗处理方法及不同的嫁接方法进行的连续5年的试验研究,总结出了薄壳山核桃规模化扩繁的成套技术。这套技术包括选用大粒饱满种子,施足基肥,培育壮苗,壮苗于年前断根移栽,提前采集接穗并低温保存,用切接或劈接法嫁接,嫁接后增温育苗。试验结果表明:实生砧木的培育周期从2~3 a缩短为1 a,1~2年生砧木嫁接成活率稳定在80%左右;繁育出了良种嫁接苗1.5万株;建立了早实丰产示范基地6处34.67 hm2,造林成活率达到90%以上;其中"马汉(Mahan)"嫁接苗造林后,2~3年始花,3~4年可挂果。 相似文献
8.
9.
This paper dealt with an experiment on container seedlings culture with nonwoven and light medium for Cupressus funebris, a precious timber tree species, through orthogonal design. The effects of container height, quantities of controlled release fertilizer and the medium proportion on seedling quality of Cupressus funebri were studied. The results showed that seedling height, ground diamater, divarication number and the ratio of seedling height to ground diameter of Cupressus funebri were significantly affected by the height of container and the quantities of controlled release fertilizer, and little influenced by the medium proportion. There were significant different influences on seedling growth among different treatment combinations. The treatment combination No.9 was the best one with averaged seedling height, ground diamater, divarication number and the ratio of seedling height to ground diameter of 21.75 cm, 0.271 cm, 10.7 branches and 80.29, respectively. The treatment combination of No.6, No.3 and No. 5 were relatively good treatment. The length of seedling container of nonwoven with diameter of 5 cm for Cupressus funebris, could be selected as 10—12 cm. The quantities of controlled release fertilizer of 3 kg·m-3 and the seedlings density of 215—220 plants·m-2 could be the optimal for nursing seedling with high quality. The costs of medium proportion on several container seedlings base of Zhejiang Province were compared and analyzed. 相似文献
10.