失水胁迫对长白落叶松播种苗移栽期活力的影响

doi:10.11707/j.1001-7488.20110628

Scientia Silvae Sinicae ›› 2011, Vol. 47 ›› Issue (6): 188-193.doi: 10.11707/j.1001-7488.20110628

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Effect of Air-Drying on Vigor of Larix olgensis Seedlings during Transplantation

Kang Yaoyao¹, Liu Yong¹, Li Guolei¹, Ma Lüyi¹, Jia Zhongkui¹, Jiang Changji², Liu Fusen², Li Xuelian²

1. Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University Beijing 100083;2. Jiangmifeng Nursery of Longtan District, Jilin City Jilin 132206

Received:2010-07-19 Revised:2011-01-20 Online:2011-06-25 Published:2011-06-25

Abstract

Abstract:

Larix olgensis seedlings were exposed to the air-drying treatments during the transplanting process. The relative moisture content, water potential, root vigor and seedling performance after transplantation were measured. The relationships among these indicators were discussed. The results showed that the seedling vigor of Larix olgensis seedling was related closely with its seedling moisture condition. The relative moisture content, water potential and root vigor were decreased gradually with the air-drying time lasting, and the transplanted seedling performance in current year was weaker too. The critical value of relative moisture content, water potential and TTC reduction intensity was 54.46%,-0.38 MPa and 39.88% respectively for the seedlings whose survival rate after transplanting ≥85%, while the value was 18.68%,-2.21 MPa and 0 respectively for the dying seedlings. The tolerable exposure time to the air-drying was within 30 min. It is suggested that the root of Larix olgensis seedling should not be exposed over 30 min during transplanting process.

Key words: Larix olgensis, seedling, air-drying, seedling vigor

CLC Number:

S723.3

Kang Yaoyao;Liu Yong;Li Guolei;Ma Lüyi;Jia Zhongkui;Jiang Changji;Liu Fusen;Li Xuelian. Effect of Air-Drying on Vigor of Larix olgensis Seedlings during Transplantation[J]. Scientia Silvae Sinicae, 2011, 47(6): 188-193.

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Effect of Air-Drying on Vigor of Larix olgensis Seedlings during Transplantation

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