This paper deals with tubeseedling afforestation of Calamus simplicifolius. The survival rate of tubeseedlings planted in arboretum and Duadanga grandiflora forest is not lower than that of normal seedling...This paper deals with tubeseedling afforestation of Calamus simplicifolius. The survival rate of tubeseedlings planted in arboretum and Duadanga grandiflora forest is not lower than that of normal seedlings. That indicates the afforestation requirements of tubeseedlings, such as site selection, site preparation, shading trees and planting, can be similar to those of normal seedlings. The survival rate of tubeseedlings planted in arboretum, teak forest, Michelia macclurei forest, Duadanga grandiflora forest and natural secondary forest can be higher than ninety percent. The afforestation results of clump seedlings show that the survival rate of shoots in the clump is relative to their initial height before afforestation. The highest shoot in clumps has the highest survival rate. In clump seedlings, individual shoots with a height lower than 20 cm have very low afforestation survival rate. There is eminent difference among the height growth of different tissue culture families. This indicates the selection of elite family or plus plant can enhance the production of rattan forests. Experiment results also show that plants developed from tubeseedlings have stronger suckering ability and can germinate suckers one or two years earlier than those developed from normal seedlings. This phenomenon needs more research and more attention should be paid on the remnant impact of plant growth regulators applied in proliferation culture.展开更多
The growth character of 4 tube seedling families, namely, CS3, CS5, CS10 and CS11 of Calamus simplicifolius was analyzed through the comparitive experiment with normal seedlings(CK). The result showed that at the age ...The growth character of 4 tube seedling families, namely, CS3, CS5, CS10 and CS11 of Calamus simplicifolius was analyzed through the comparitive experiment with normal seedlings(CK). The result showed that at the age of 1, the seedling’ height of CS3 and CS5 was higher than that of both CS10 and CS11, gaining highly significant difference while the height of CS10 and CS11 was higher than that of CK at significant and extremely significant level respectively. After afforestation, the survival rate of 4 families decreased rapidly at first, and then decreasing gradually slow down, finally, the rate kept steady with year increasing. Survival rate varied a bit, but no significant difference was found among families. Tissue culture families started to sucker more identically and earlier than normal seedlings. As for suckering rate and mean number of sucker shoot, tissue culture families were higher than normal seedlings, and then the sequence of suckering ability, CS11>CS10>CS5>CS3 was arranged. The total stem number of the clump was consistent with suckering ability among families where CS11 was the largest, CS10 and CS5 was larger, and CS3 as well as CK was the smallest, but no significant difference appeared. Mean length of mother stem and mean total length of rattan clump differed significantly at the level of 0.05 and 0.01 among families. Based on the variance analysis and multiple comparisons, two types of tissue culture families, superior type and common one were classified.展开更多
文摘This paper deals with tubeseedling afforestation of Calamus simplicifolius. The survival rate of tubeseedlings planted in arboretum and Duadanga grandiflora forest is not lower than that of normal seedlings. That indicates the afforestation requirements of tubeseedlings, such as site selection, site preparation, shading trees and planting, can be similar to those of normal seedlings. The survival rate of tubeseedlings planted in arboretum, teak forest, Michelia macclurei forest, Duadanga grandiflora forest and natural secondary forest can be higher than ninety percent. The afforestation results of clump seedlings show that the survival rate of shoots in the clump is relative to their initial height before afforestation. The highest shoot in clumps has the highest survival rate. In clump seedlings, individual shoots with a height lower than 20 cm have very low afforestation survival rate. There is eminent difference among the height growth of different tissue culture families. This indicates the selection of elite family or plus plant can enhance the production of rattan forests. Experiment results also show that plants developed from tubeseedlings have stronger suckering ability and can germinate suckers one or two years earlier than those developed from normal seedlings. This phenomenon needs more research and more attention should be paid on the remnant impact of plant growth regulators applied in proliferation culture.
文摘The growth character of 4 tube seedling families, namely, CS3, CS5, CS10 and CS11 of Calamus simplicifolius was analyzed through the comparitive experiment with normal seedlings(CK). The result showed that at the age of 1, the seedling’ height of CS3 and CS5 was higher than that of both CS10 and CS11, gaining highly significant difference while the height of CS10 and CS11 was higher than that of CK at significant and extremely significant level respectively. After afforestation, the survival rate of 4 families decreased rapidly at first, and then decreasing gradually slow down, finally, the rate kept steady with year increasing. Survival rate varied a bit, but no significant difference was found among families. Tissue culture families started to sucker more identically and earlier than normal seedlings. As for suckering rate and mean number of sucker shoot, tissue culture families were higher than normal seedlings, and then the sequence of suckering ability, CS11>CS10>CS5>CS3 was arranged. The total stem number of the clump was consistent with suckering ability among families where CS11 was the largest, CS10 and CS5 was larger, and CS3 as well as CK was the smallest, but no significant difference appeared. Mean length of mother stem and mean total length of rattan clump differed significantly at the level of 0.05 and 0.01 among families. Based on the variance analysis and multiple comparisons, two types of tissue culture families, superior type and common one were classified.
文摘【目的】揭示中国沙棘根蘖能力及非结构性碳水化合物(NSC)积累特征对平茬高度的响应规律,确定最有利于根蘖及NSC积累潜力发挥的平茬高度,探讨根蘖能力调控的NSC积累与分配策略。【方法】以15 a中国沙棘人工林为研究对象,设置不平茬(对照)和平茬高度0,10,20 cm 3个处理,采用回归分析探究根蘖能力(根蘖植株数量和生长量、根系延伸能力和分枝强度)、各构件(叶片、枝条、树干、伐桩、垂直根、水平根)非结构性碳水化合物的积累能力(含量、储量)和分配格局与平茬高度的关系,采用相关性分析和通径分析探究非结构性碳水化合物积累能力与根蘖能力的因果关系及其作用途径。【结果】①随着平茬高度的增大,中国沙棘根蘖能力和NSC积累能力先升后降,最有利于根蘖能力和NSC积累潜力发挥的适宜平茬高度为10~13 cm。②平茬后,中国沙棘各个构件NSC含量以及叶片、垂直根、水平根NSC储量与其分配比例大多大于或显著大于对照。③中国沙棘根蘖能力与NSC积累能力呈正相关,根蘖植株数量、生长量与根系延伸能力、分枝强度呈正相关。其中,树干和水平根的NSC储量对根蘖植株数量起主导作用,叶片和垂直根的NSC储量对根蘖植株生长量起主导作用。【结论】中国沙棘通过NSC含量、储量及其分配格局调节对平茬高度做出响应,从而决定根蘖潜力的发挥程度。由于NSC积累能力随沙棘平茬高度的增大先升后降,因此根蘖能力亦呈先升后降趋势。在此调节过程中,沙棘叶片、水平根、垂直根NSC积累能力与分配比例的提高对其根蘖潜力发挥起着关键作用。
