摘要
测定了非洲狗尾草不同种子质量的千粒重,确定其千粒重范围为0. 25~1. 20g;在理论上计算不同发芽率条件下单位面积上非洲狗尾草应发芽的种子数,与地间实际发芽率结果相比较;同时,测定了不同发芽率条件下非洲狗尾草平均单株分蘖数、平均单位面积地间分蘖数及在郁闭条件下生长受阻的低矮植株数。结果表明:非洲狗尾草的地间出苗数受土壤条件、水分条件、温度条件、播种方式的影响较大;非洲狗尾草具有较强的分蘖补偿能力,通过分蘖调节,可弥补发芽率较低的种子对生产造成的影响;发芽率较高的非洲狗尾草种子建植的人工草地,由于分蘖后植株密度较高,致使部分低矮植株被郁闭后而停止生长并逐步死亡,存在郁闭调节的作用。
The weight of 1000 grains of different seed quality of Setaria sphacelata was determined in the range of 0. 25 ~ 1. 20 g. The number of seeds that should germinate on Setaria spacelata per unit area under different germination rates was calculated theoretically,and comparison with actual germination rate in soil. At the same time,the average number of tillers per plant,the average number of tillers per unit area and the number of low plants that were blocked under the condition of closure were measured. The results showed that the number of interground seedlings of Setaria sphacelata was greatly affected by soil conditions,water conditions,temperature conditions and sowing methods. Setaria sphacelata had a strong tillering compensation ability. Through tillering regulation,it could make up for the influence of seeds with low bud rate on production. Planted with seeds of Setaria sphacelata with high germination rate,due to the high density of the plant,there was a adjustment of canopy density effect,resulting in some low plants being adjustment of canopy density and stopped growing and gradually died.
作者
匡崇义
张美艳
薛世明
KUANG Chong-yi;ZHANG Mei -yan;XUE Shi-ming(Yunnan Academe of Grassland and Animal Science,Xiaoshao 650212,China)
出处
《草学》
2019年第5期31-34,共4页
Journal of Grassland and Forage Science
基金
国家牧草产业技术体系德宏综合试验站
云南省草产业技术体系共同资助
关键词
非洲狗尾草
分蘖补偿
郁闭调节
Setaria sphacelata
tiller compensation
adjustment of canopy density
