A Study of the Effects of Shading on the Growth and Development of <i>Davidia involucrata</i> Seedlings

HAN Su-ju

doi:10.16779/j.cnki.1003-5508.2014.05.010

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Volume 35 Issue 5

Nov. 2019

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Article Navigation > Journal of Sichuan Forestry Science and Technology > 2014 > 35(5): 45-48

HAN Su-ju. A Study of the Effects of Shading on the Growth and Development of Davidia involucrata Seedlings[J]. Journal of Sichuan Forestry Science and Technology, 2014, 35(5): 45-48. doi: 10.16779/j.cnki.1003-5508.2014.05.010

Citation:

HAN Su-ju. A Study of the Effects of Shading on the Growth and Development of Davidia involucrata Seedlings[J]. Journal of Sichuan Forestry Science and Technology, 2014, 35(5): 45-48. doi: 10.16779/j.cnki.1003-5508.2014.05.010

A Study of the Effects of Shading on the Growth and Development of Davidia involucrata Seedlings

doi: 10.16779/j.cnki.1003-5508.2014.05.010

HAN Su-ju

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Mianyang Normal University, Mianyang 621000, China

Received Date: 2014-06-04

Abstract

In order to investigate the effects of shading on the growth and development of Davidia involucrata seedlings,a comparative study was made of the photosynthetic characteristics and growth characteristics of D. involucrata seedlings. The one-year old D. involucrata seedlings cultivated were used as experimental materials under different light intensity (100%,50% and 25%). The results showed that (1) the daily net photosynthetic rates of different shading treatments of D. involucrata seedlings were all bimodal curves and "Midday depression" phenomenon was observed. But under different light intensity the value and time of the peak were different. The daily variation trend of transpiration rate under different light intensity was different and in an order of one-layer shading (5%) > two-layer shading (25%) > full sunlight.. (2) The average leaf area,specific leaf area and leafstalk length of Davidia involucrate under shading were larger than those of Davidia involucrate under full sunlight. It indicated that Davidia involucrate had strong ability of utilizing the limited low light resource. This study showed that Davidia involucrata seedlings grew best under appropriate shading(50% Transmittance).
- Davidia involucrate;
- Seedling shading;
- Light quality;
- Photosynthetic characteristics;
- Growth characteristics
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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A Study of the Effects of Shading on the Growth and Development of Davidia involucrata Seedlings

doi: 10.16779/j.cnki.1003-5508.2014.05.010

HAN Su-ju

Mianyang Normal University, Mianyang 621000, China

Received Date: 2014-06-04

Key words:

Abstract: In order to investigate the effects of shading on the growth and development of Davidia involucrata seedlings,a comparative study was made of the photosynthetic characteristics and growth characteristics of D. involucrata seedlings. The one-year old D. involucrata seedlings cultivated were used as experimental materials under different light intensity (100%,50% and 25%). The results showed that (1) the daily net photosynthetic rates of different shading treatments of D. involucrata seedlings were all bimodal curves and "Midday depression" phenomenon was observed. But under different light intensity the value and time of the peak were different. The daily variation trend of transpiration rate under different light intensity was different and in an order of one-layer shading (5%) > two-layer shading (25%) > full sunlight.. (2) The average leaf area,specific leaf area and leafstalk length of Davidia involucrate under shading were larger than those of Davidia involucrate under full sunlight. It indicated that Davidia involucrate had strong ability of utilizing the limited low light resource. This study showed that Davidia involucrata seedlings grew best under appropriate shading(50% Transmittance).