| Growth responses of Picea mongolica seedlings to defoliation rate | |
| Alternative Title | Growth responses of Picea mongolica seedlings to defoliation rate |
| Zou CJ1; Han SJ1; Qi SY1; Xu WD1; Li DT1 | |
| 2005 | |
| Source Publication | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| ISSN | 1001-0742 |
| Volume | 17Issue:2Pages:232-236 |
| Abstract | Picea mongolica W. D. Xu. is an endemic species in China. The spruce forest is only found in semi-arid habitat in Inner Mongolia Autonomous Region of China. Based on the simulative defoliation experiment, it was proved that Picea mongolica seedlings had the compensatory and overcompensatory effects under the certain defoliation rate. The results of variance analysis on growth indexes showed that in PM I (natural regeneration seedlings under Picea mongolica forest), the differences of H-1 (height in June 23) and H-1 (height in September 3) were extremely significant, and the difference of D(diameter at the breast height) were not significant. In PM II (artificial regeneration seedlings under Betula platyphylla Sulk. forest) the difference of H-1 was significant, the difference of H-2 was not significant, and the difference of D was extremely significant. The regression equations were established and the compensatory and overcompensatory points were obtained. In PM I, the compensatory points of H-1, H-2, and D were 0.7628, 0.7436, 0.5725, and the overcompensatory points were 0.6056, 0.5802 and 0.2909 respectively. In PM II, the compensatory points of H, H2, and D are 0.5012, 0.3421, 0.2488, and the overcompensatory points are 0.4137, 0.2633 and 0.0747 respectively. These results suggested that the induction of compensatory growth mechanisms in spruce seedlings required a threshold level of defoliation, and the insects in Picea mongolica forest could be controlled in a certain degree. |
| Other Abstract | Picea mongolica W. D. Xu. is an endemic species in China. The spruce forest is only found in semi-arid habitat in Inner Mongolia Autonomous Region of China. Based on the simulative defoliation experiment, it was proved that Picea mongolica seedlings had the compensatory and overcompensatory effects under the certain defoliation rate. The results of variance analysis on growth indexes showed that in PM Ⅰ (natural regeneration seedlings under Picea mongolica forest), the differences of H1 (height in June 23) and H2 (height in September 3) were extremely significant, and the difference of D(diameter at the breast height) were not significant. In PM Ⅱ (artificial regeneration seedlings under Betula platyphylla Suk. forest), the difference of H1 was significant, the difference of H2 was not significant, and the difference of D was extremely significant. The regression equations were established and the compensatory and overcompensatory points were obtained. In PM Ⅰ , the compensatory points of H1, H2, and D were 0.7628, 0.7436, 0.5725, and the overcompensatory points were 0.6056, 0.5802 and 0.2909 respectively. In PM Ⅱ, the compensatory points of H1, H2, and D are 0.5012, 0.3421, 0.2488, and the overcompensatory points are 0.4137, 0.2633 and 0.0747 respectively. These results suggested that the induction of compensatory growth mechanisms in spruce seedlings required a threshold level of defoliation, and the insects in Picea mongolica forest could be controlled in a certain degree. |
| Keyword | QUERCUS-RUBRA L NUTRIENT AVAILABILITY COMPENSATORY RESPONSE SIMULATED HERBIVORY PLANT TOLERANCE FRUIT-SET NITROGEN DAMAGE OVERCOMPENSATION COMPETITION Picea mongolica W. D. Xu compensate overcompensate growth defoliation rate |
| Indexed By | CSCD |
| Language | 英语 |
| CSCD ID | CSCD:1918807 |
| Citation statistics |
Cited Times:1[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/152694 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.上海交通大学 2.中国科学院 3.中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Zou CJ,Han SJ,Qi SY,et al. Growth responses of Picea mongolica seedlings to defoliation rate[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2005,17(2):232-236. |
| APA | Zou CJ,Han SJ,Qi SY,Xu WD,&Li DT.(2005).Growth responses of Picea mongolica seedlings to defoliation rate.JOURNAL OF ENVIRONMENTAL SCIENCES,17(2),232-236. |
| MLA | Zou CJ,et al."Growth responses of Picea mongolica seedlings to defoliation rate".JOURNAL OF ENVIRONMENTAL SCIENCES 17.2(2005):232-236. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment