农学学报
農學學報
농학학보
Chinese Countryside Well-off Technology
2015年
2期
57-60
,共4页
闽楠%林下生境%生长%表型可塑性%生物量分配比%林隙
閩楠%林下生境%生長%錶型可塑性%生物量分配比%林隙
민남%림하생경%생장%표형가소성%생물량분배비%림극
Phoebe bournei%Understory Habitats%Growth%Phenotypic Plasticity%Biomass Allocation%Canopy Gap
为合理配置林下闽楠更新层，在福建明溪对不同林下生境10年生闽楠的生长表现及表型可塑性进行研究。结果表明：（1）林下生境对10年生闽楠的生长有着显著性影响，在促进闽楠生长方面，林隙＞林冠下，林下生境的选择与配置是林下闽楠人工林培育关键措施；（2）林下生境对闽楠植株形态有着显著性影响，表现出强烈的表型可塑性。林隙生境对闽楠的冠长及树冠率影响明显大于林冠下；（3）林下生境未显著改良闽楠的树干生物量分配比、树根生物量分配比及冠根比；但林隙生境的皮、枝、叶生物量分配比显著高于林冠下生境，有着强烈的表型可塑性。表明在适合闽楠生长的林隙生境下，闽楠通过增加皮、枝、叶生物量分配比，采取快速的资源获取而促进生长的策略；在不适宜生境时则通过减少枝、叶生物量分配比，采取保守生存策略，进行缓慢的资源获取和消耗策略。
為閤理配置林下閩楠更新層，在福建明溪對不同林下生境10年生閩楠的生長錶現及錶型可塑性進行研究。結果錶明：（1）林下生境對10年生閩楠的生長有著顯著性影響，在促進閩楠生長方麵，林隙＞林冠下，林下生境的選擇與配置是林下閩楠人工林培育關鍵措施；（2）林下生境對閩楠植株形態有著顯著性影響，錶現齣彊烈的錶型可塑性。林隙生境對閩楠的冠長及樹冠率影響明顯大于林冠下；（3）林下生境未顯著改良閩楠的樹榦生物量分配比、樹根生物量分配比及冠根比；但林隙生境的皮、枝、葉生物量分配比顯著高于林冠下生境，有著彊烈的錶型可塑性。錶明在適閤閩楠生長的林隙生境下，閩楠通過增加皮、枝、葉生物量分配比，採取快速的資源穫取而促進生長的策略；在不適宜生境時則通過減少枝、葉生物量分配比，採取保守生存策略，進行緩慢的資源穫取和消耗策略。
위합리배치림하민남경신층，재복건명계대불동림하생경10년생민남적생장표현급표형가소성진행연구。결과표명：（1）림하생경대10년생민남적생장유착현저성영향，재촉진민남생장방면，림극＞림관하，림하생경적선택여배치시림하민남인공림배육관건조시；（2）림하생경대민남식주형태유착현저성영향，표현출강렬적표형가소성。림극생경대민남적관장급수관솔영향명현대우림관하；（3）림하생경미현저개량민남적수간생물량분배비、수근생물량분배비급관근비；단림극생경적피、지、협생물량분배비현저고우림관하생경，유착강렬적표형가소성。표명재괄합민남생장적림극생경하，민남통과증가피、지、협생물량분배비，채취쾌속적자원획취이촉진생장적책략；재불괄의생경시칙통과감소지、협생물량분배비，채취보수생존책략，진행완만적자원획취화소모책략。
In order to rationally configure Phoebe bournei updated layer, a research on the growth influence and the phenotypic plasticity of 10-years-old of P. bournei with different habitats was conducted in Mingxi Fujian. The results showed that: (1) understory habitats had a significant impact on the growth of 10-year-old P. bournei plantations, and the sequence of promoting growth of P. bournei plantations from high to low was canopy gap and understory;understory habitat selection and configuration was a key measure of understory P. bournei plantations; (2) understory habitats had a very significant impact on the plant morphology, showed a strong phenotypic plasticity, crown length and the crown rate of P. bournei in canopy gap were significantly greater than those in the understory habitats; (3) understory habitats didn’t bring significant change to stem biomass allocation, root biomass allocation and crown-root ratio;branch biomass allocation and leaf biomass allocation of Phoebe bournei in canopy gap were significantly higher than those in understory habitat, showed a strong phenotypic plasticity. In the appropriate understory habitats, P. bournei plantations had rapid resource acquisition, including increased leaf and branch biomass allocation ratio. Otherwise, P. bournei plantations adopted conservative consumed strategies by reducing leaf and branch biomass allocation ratio .
