Abstract
Bamboo has very wide applications such as construction materials,fibre production,biological energy,food and traditional Chinese medicines,etc.Moreover,the area of bamboo forest will increase in future as a result of bamboo industry’s development into a pillar industry in rural areas of south China.The limitation of nitrogen supplements in plant growth and biomass is more sensitive than other nutrition elements.So addition of different nitrogen fertilizers will affect the growth procession.Although there are numerous studies focusing on monopodial bamboo species,these types of key researches are missing in sympodial bamboo research,which is negative to the bamboo industry.Investigating the plasticity and physioecology of sympodial bamboo is helpful to comprehend its adaptability under different cultivation and afforestation conditions.In order to understand the relationship between plasticity of sympodial bamboo and soil nitrogen input under the semi-natural and afforestation condition,the morphological and physiological adaptability variations of two sympodial bamboo seedlings,namely,Oxytenanthera braunii(wine bamboo)and Dendrocalamopsis oldhami,were studied.We set up 5nitrogen fertilization CO(NH2)2levels,i.e.N0(calculated by N content),N40,N80,N120,N160kg/hm 2 after 52.7kg / hm 2 Ca(H 2 PO 4) 2 and(K 2 SO 4) K 2 O 56.3kg / hm 2 were applied into the soil.And 1alater,we measured the morphological and photosynthesis characteristics.Results showed that wine bamboo had higher biomass and resource utilization efficiency compared with D.oldhami.And the optimal nitrogen fertilizer level for wine bamboo was about N 120 while for D.oldhami was N 80,so wine bamboo had higher utilization capacity.These two bamboos achieved their most optimized light utilization by elevating SLA,extending crown,increasing total leave areas and developing height.Meanwhile,the positive behavior was observed that the relative growth rate and root radius of wine bamboo and D.oldhami increased with the increase of nitrogen level.The nitrogen content of N 160 was to high that it affected the optimal growth,but it was still better than N 40 and the control treatment.Under the condition of medium nitrogen fertilizer supply(N 80 N 120),the physiological traits such as P max,LSP,LCP,R d and φAQY were improved.The data of lower nitrogen supply like N 40 treatment implied that the plasticity responses were not significant except for the root and φAQY.The higher biomass and SLA of wine bamboo,representing the capacity of absorbing carbon dioxide,implied that it could possess better adaptation and stronger propagation ability in the mid-high mountains of Southwest China after being introduced and afforested.The result of this study indicated that sympodial bamboo such as wine bamboo and D.oldhami should be planted on fertile soils where its habitat is managed to decrease the weeds growth,increase the root radius,branch length and total leaves areas so as to extend the crown to elevate photosynthesis and propagation rate.
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Claims 12
Claim · model-written summary
Wine bamboo had higher biomass than D. oldhami.
Verbatim
e0“wine bamboo had higher biomass and resource utilization efficiency compared with D.oldhami.”
Claim · model-written summary
Wine bamboo had higher resource utilization efficiency than D. oldhami.
Verbatim
e0“wine bamboo had higher biomass and resource utilization efficiency compared with D.oldhami.”
Claim · model-written summary
The optimal nitrogen fertilizer level for wine bamboo was about N 120.
Verbatim
e0“the optimal nitrogen fertilizer level for wine bamboo was about N 120 while for D.oldhami was N 80”
Claim · model-written summary
The optimal nitrogen fertilizer level for D. oldhami was N 80.
- Taxon
- D.oldhami
Bambusa oldhamiie0 - Outcome
- optimal nitrogen fertilizer levele0
- Value
- N 80e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the optimal nitrogen fertilizer level for wine bamboo was about N 120 while for D.oldhami was N 80”
Claim · model-written summary
Both bamboos optimized light utilization by elevating SLA, extending crowns, increasing leaf area and height.
- Outcome
- light utilizatione0
- Qualifier
- elevating SLA,extending crown,increasing total leave areas and developing heighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These two bamboos achieved their most optimized light utilization by elevating SLA,extending crown,increasing total leave areas and developing height.”
Claim · model-written summary
Relative growth rate and root radius of wine bamboo and D. oldhami increased with nitrogen level.
Verbatim
e0“the relative growth rate and root radius of wine bamboo and D.oldhami increased with the increase of nitrogen level.”
Claim · model-written summary
N 160 impaired optimal growth, although it performed better than N 40 and control.
Verbatim
e0“The nitrogen content of N 160 was to high that it affected the optimal growth,but it was still better than N 40 and the control treatment.”
t0“bamboo”
Claim · model-written summary
Medium nitrogen supply improved P max, LSP and LCP.
Not reportedComparator
Verbatim
e0“Under the condition of medium nitrogen fertilizer supply(N 80 N 120),the physiological traits such as P max,LSP,LCP,R d and φAQY were improved.”
t0“bamboo”
Claim · model-written summary
Medium nitrogen supply improved R d and φAQY.
Not reportedComparator
Verbatim
e0“Under the condition of medium nitrogen fertilizer supply(N 80 N 120),the physiological traits such as P max,LSP,LCP,R d and φAQY were improved.”
t0“bamboo”
Claim · model-written summary
At N 40, plasticity responses were not significant except root and φAQY.
Verbatim
e0“The data of lower nitrogen supply like N 40 treatment implied that the plasticity responses were not significant except for the root and φAQY.”
t0“bamboo”
Claim · model-written summary
Higher biomass and SLA suggested wine bamboo could adapt and propagate better in mid-high Southwest China mountains.
Verbatim
e0“The higher biomass and SLA of wine bamboo,representing the capacity of absorbing carbon dioxide,implied that it could possess better adaptation and stronger propagation ability in the mid-high mountains of Southwest China after being introduced and afforested.”
Claim · model-written summary
The authors recommend planting sympodial bamboo on fertile soils with habitat management to reduce weeds and promote crown, photosynthesis and propagation.
Verbatim
e0“sympodial bamboo such as wine bamboo and D.oldhami should be planted on fertile soils where its habitat is managed to decrease the weeds growth,increase the root radius,branch length and total leaves areas so as to extend the crown to elevate photosynthesis and propagation rate.”