摘要
早春 2 5 0、5 0 0、75 0、10 0 0 mg/ L ,10 0 m L / m2 多效唑处理对高羊茅生长及种子生产的研究结果表明 ,处理延长全生育期 8～ 10 d,显著降低植株高度 ,提高单株茎蘖数和单株成穗数 ,有效地防止植株倒伏。 5 0 0 mg/ L (0 .5kg/ hm2 )以下处理显著提高种子产量 ,种子产量的提高主要归因于单株成穗数的显著提高。高浓度处理对种子生产不利。多效唑处理对种子千粒重影响较小。
A field experiment of spring-applied paclobutrazol to tall fescue (Festuca arundinacea Schreb. cv. Fawn and Pixie) at rate of 0.25, 0.50, 0.75 or 1.00 kg/hm2 was conducted. The results indicated that the seed mature time was delayed for 8 to 10 days and plant height was decreased significantly by the treatment. Application rate of paclobutrazol (less than 0.5 kg/hm2) increased seed yield significantly. The increase in seed yield was related with increasing production of fertile tillers. Among the seed yield components, ears per area and seed number per ear played the major role in contributing to the seed yield. High rate treatment such as 1.0 kg/hm2 showed the negative effects on seed production. The seed weight was little affected by palclobutrazol application.
出处
《草业学报》
CSCD
2002年第4期88-93,共6页
Acta Prataculturae Sinica
基金
高等学校骨干教师资助计划 (E2 0 0 0 1 1 )资助。
关键词
多效唑
高羊茅
生长
种子生产
春季
growth
paclobutrazol
tall fescue
seed production
