【摘要】 1997～ 1999年在宁夏引黄灌区研究了草坪型多年生黑麦草主要生长发育特性。结果表明 ,草坪型多年生黑麦草 5～ 9月各月出叶速度与月平均温度的关系可用一元二次方程来表示 :Y =9 4 986 +0 0 6 2 4t -0 0 10 4t2 (R =0 9987 ) ;主茎的叶序与分蘖之间存在数量上的同伸关系“三 0 ,四 1,五 2 ,六 4 ,七 7,八12”。花后 2 6～ 2 7d ,小穗干重最大 ,其含水量为 4 1 15 % ,种子不易落粒 ,为多年生黑麦草种子适宜收获期。更多还原

【Abstract】 The growth and development characteristics of turf type perennial ryegrass ( Lolium perenne ) were studied in Yellow River irrigation area in Ningxia from 1997 to 1999 The results show that the relationship between leaf emergence rate from May to September and monthly average temperature could be described by the equation: Y=9 498 6+0 062 4 t-0 010 4 t 2, (R =0 998 7 ** ) The order of leaves on main stem and an emerging tiller were synchronous to a certain degree The optimum time for seed harvesting was 26～27 days after anthesis, when DM (dry matter) of the spikelet is the highest with 41 15% of water content更多还原