野生鸭茅生育特性多样性研究

目的]系统研究野生鸭茅生长发育特性。方法]对从我国野生鸭茅主要分布区和国外收集的35份野生鸭茅种质的生育特性进行研究。结果]早熟型在拔节期前后进入生长高峰期,日均增长速度最快为1.93 cm/d,生育期为249 d,营养、生殖生长期分别为199、50 d;缓慢生长型在整个生长期间的生长速度都极为缓慢,在试验区只有营养生长,而无生殖生长;晚熟型在孕穗期生长速度最快,生育期为289 d,营养、生殖生长分别需251和38 d;中熟型介于早、晚熟型之间;早熟型具有营养生长期比中、晚熟型短,而生殖生长期比中、晚熟型长的特点,前者开花~成熟期要比后两者分别长9和13 d;晚熟型成熟期株高显著高于早、中熟型。结论]野生鸭茅种质生育特性呈现多样性变异。

Study on the Diversity in the Growth and Development Characteristics of Wild Dactylis glomerata L.

Objective] The purpose was to study the growth and development characteristics of wild Dactylis glomerata L systematically.Method] The growth and development characteristics of 35 wild D.glomerata germplasms selected from its main distribution area in China and overseas were studied.Result] The premature type entered into the peak period of growth in before and after jointing stage,its fastest average daily growth speed was 1.93 cm/d,its growth period was 249 d and its vegetative and reproductive growth periods were 199 and 50 d resp.The growth speed of slowly growing type in the whole growth period was very slow and it had only vegetative growth and no reproductive growth in the experimental area.The growth speed of late maturing type was fastest in booting stage and its growth period was 289 d,its vegetative and reproductive growths needed 251 and 38 d resp.The medium-maturing type was between premature type and late maturing type.The premature type had characteristics of shorter vegetative growth period than that of medium-and late maturing types and longer reproductive period than two latters and its flowering-mature period was 9 and 13 d longer than two latters.The plant height of late maturing type in mature period was significantly higher than that of premature and medium-maturing types.Conclusion] The growth and development characteristics of wild D.glomerata germplasm showed diversified variation.