Characteristics of Phosphorus Efficiency of Different Provenaces in Liriodendron chinese

WANG Jian; ZHOU Zhi-chun; RAO Long-bing; JIN Guo-qing; LI Jian-min

Soil culture experiments at two phosphorus levels (5 mg·kg-1 and 180 mg·kg-1) were conducted to study the characteristics of phosphorus efficiency of different provenances of Liriodendron chinese. The result showed that phosphorus efficiency varied from 15.4% to 38.9% with the provenances tested.Based on the sensitivity to phosphorus supply and growth performance at two phosphorus levels,the provenance from Tongdao of Hunan could be considered as a superior provenance with high phosphorus efficiency or high tolerability to phosphorus stress,while that from Liping of Guizhou and Shaoyang of Hunan were two excellent provenances with moderate and strong sensitivity to phosphorus supply respectively.It was found that PE was significantly and positively related to P absorption,but P use efficiency.The dry matter accumulation of provenance under low phosphorus stress was a good indicator of its phosphorus efficiency.Compared with the provenances with low PE,the provenances with high PE possessed greater dry matter accumulation,more and larger leaves,extensive lateral root system and more fibrous roots in phosphorus stress.Provenances with low phosphorus efficiency were observed to appeared symptoms of phosphorus deficiency.

1. Research Institute of Subtropical Forestry, CAF, Fuyang 3114001, Zhejiang, China

2. Shangdong Agriculture University, Taian 271018, Shangdong, China

3. The Extending Center for Forestry Science and Technology of Fujian Province, Fuzhou 350003, Fujian, China

Received Date: 2005-03-15

Abstract: Soil culture experiments at two phosphorus levels (5 mg·kg-1 and 180 mg·kg-1) were conducted to study the characteristics of phosphorus efficiency of different provenances of Liriodendron chinese. The result showed that phosphorus efficiency varied from 15.4% to 38.9% with the provenances tested.Based on the sensitivity to phosphorus supply and growth performance at two phosphorus levels,the provenance from Tongdao of Hunan could be considered as a superior provenance with high phosphorus efficiency or high tolerability to phosphorus stress,while that from Liping of Guizhou and Shaoyang of Hunan were two excellent provenances with moderate and strong sensitivity to phosphorus supply respectively.It was found that PE was significantly and positively related to P absorption,but P use efficiency.The dry matter accumulation of provenance under low phosphorus stress was a good indicator of its phosphorus efficiency.Compared with the provenances with low PE,the provenances with high PE possessed greater dry matter accumulation,more and larger leaves,extensive lateral root system and more fibrous roots in phosphorus stress.Provenances with low phosphorus efficiency were observed to appeared symptoms of phosphorus deficiency.

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Reference (9)

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Characteristics of Phosphorus Efficiency of Different Provenaces in Liriodendron chinese

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References

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