摘要
采用池栽试验，研究了磷对花生叶源生理特性的影响。结果表明：生育中期，施磷可显著增加花生叶源的光合能力，其中叶面积系数、叶绿素含量和净光合速率比不施磷处理分别增加11．8％～16．3％、14．3％～20．1％和15．6％～34．1％，碳氮含量分别增加23．4％～41．5％和13．5％～24．3％；在施磷（P2O3）30～90k·hm-2范围内，上述参数均随施磷量的增加而增加。另外施磷可提高叶片抗氧化能力，其中超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）活性分别提高11．9％～25．4％、13．5％～20．7％和28．0％～46．7％，膜质过氧化产物丙二醛（MDA）含量降低11．9％～21．3％。收获期，MDA含量随施磷量的增加而增加，其他生理指标呈现减少的趋势，这一现象可能与施磷花生生育后期叶片营养过多转移到荚果出现早衰有关。施磷可显著提高粒叶比，增强叶源生产效率，进而增加荚果产量。
A pool experiment was conducted to study effects of phosphorus application rate on physiological characteristics of leaf source in peanut. Results showed that： At the middle growing stage, application phosphorus could significantly increase the leaf source photosynthetic capacity, in which leaf area index, chlorophyll content, net photosynthetic rate, carbon and nitrogen content enhanced by 11.8% -16.3% , 14. 3% -20.1% , 15.6% -34.1% , 23.4% - 41.5 % and 13.5 % - 24.3 % compared with the control respectively. Within the P rate of 30 - 90 kg . hm -2, the above parameters were all inhanced with the increase of P rate. Addition of phosphorus can increase the antioxidant capacity of leaves, in which superoxide dismutase （SOD） , peroxidase （POD） , catalase （CAT） activity were increased by 11.9% - 25.4% , 13.5% - 20.7% and 28.0% - 46.7% , lipid peroxidation product malondialdehyde （MDA） content decreased by 11.9% - 21.3% compared with the control. At the harvest stage, MDA content enhanced with the increase of the P rate, while other physiological indicators showde a decreasing trend,which may be related to the premature caused by the more nutrition transportion from leaf to pod during late grpwing stage. P application could significantly increase grain-leaf ratio, enhance the production efficiency of leaf and increase pod yield.
出处
《核农学报》
CAS
CSCD
北大核心
2014年第4期727-731,共5页
Journal of Nuclear Agricultural Sciences
基金
青岛市公共领域科技支撑计划项目(12-1-3-28-nsh
11-2-3-28-nsh)
山东省科技发展计划(2012GNC11102)
山东省农业重大应用技术创新课题"夏花生高产高效关键技术研究"现代农业产业技术体系建设专项(CARS-14)
关键词
磷
花生
叶源
光合特性
活性氧代谢
粒叶比
Phosphorus
Peanut
Leaf source
Photosynthetic characteristics
Active oxygen metabolism
Grain-leafratio
