摘要
通过拔节期、孕穗期分别施用不同浓度的多效唑或矮壮素,于盛花期对老芒麦种群的生物量结构、能量累积与分配及种群倒伏率进行测定分析。结果表明,施用生长抑制剂对种群生物量结构有极显著影响(P<0.01),构件生物量受影响程度为根>茎>叶>花序;对种群能量累积有极显著影响(P<0.01),构件能量影响顺序为茎>叶>花序>根;种群生物量、能量累积与分配极显著受抑制剂种类、施用时间、浓度及互作间的影响(P<0.01);拔节期施用矮壮素利于生物量与能量向茎、叶分配,孕穗期施用仅利于向茎分配;施用多效唑利于生物量与能量向花序分配,拔节期施用效果显著高于孕穗期。牧草生产时,拔节期施用100～200mg/L的矮壮素,种子生产时,孕穗期施用200～600mg/L的多效唑可显著提高产量。生长抑制剂显著提高了根系生物量,降低了倒伏率,多效唑适合拔节期施用,矮壮素适合孕穗期施用。
The population of Elymus sibiricus was sprayed at the jointing or booting stage with various concentrations of paclobutrazol or chlormequat chloride.The biomass structure,energy accumulation and distribution,and the lodging rates of populations were determined and analyzed at the full flowering stage.After spraying growth inhibitor,there was a highly significant effect between traits and biomass of components,which led to a highly significant influence between aboveground and underground biomass structure（P0.01）.Growth inhibitor had significant effects on the energy value of leaves and stems,but little effect on energy value of roots and inflorescence（P0.05）.A highly significant influence was found between biomass and energy distribution of populations,with the influence in the sequence inflorescencestemleafroot.At the jointing stage,application of chlormequat chloride was beneficial for increasing biomass and energy in the stem and leaf but at the booting stage,it was beneficial only for biomass and energy in the stem.Application of paclobutrazol helped distribute biomass and energy to the inflorescence and at the jointing stage the effect was significantly stronger than at the booting stage.Growth inhibitors may significantly elevate root biomass and reduce the lodging rate of populations.Paclobutrazol could be applied at the jointing stage for seed production,while chlormequat chloride could be sprayed at the booting stage for forage production.At the booting stage,200 mg/L chlormequat chloride increased fresh grass yield by 10.22%,and 200-600 mg/L paclobutrazol at the jointing stage significantly raised potential seed production.
出处
《草业学报》
CSCD
北大核心
2012年第5期195-203,共9页
Acta Prataculturae Sinica
基金
国家科技支撑计划(2011BAD17B03)
四川省科技支撑计划项目(2011NZ0064)资助
关键词
老芒麦
矮壮素
多效唑
生物量
能量
Elymus sibiricus
chlormequat chloride（CCC）
paclobutrazol（PP333）
biomass
energy
