38个多花黑麦草品种在广东地区的生产适应性研究

对引自不同国家的38个多花黑麦草品种在广东地区的生产适应性进行了试验研究.结果表明:所有品种可刈割4次,其中第二茬产量最高,第四茬产量最低,第三茬产量稍高于第一茬;4茬鲜草总产量最高的7个品种依次是LMT1107、Archie、Common 1、Barmultra、Jumbo、Sabroso和01-Lm-1,都在11.22kg/m2以上,前3茬鲜草产量最高的5个品种依次为品种01-Lm-1、LMT 1107、Common 1、Archie和LWD 8181-2,在10.17kg/m2以上;干物质产量最高的5个品种依次是01-Lm-1、LWD 8181-2、BAR 9 TAM、LMT 9034和Jumbo,都在1011g/m2以上;其次为品种Barprisma、Sabroso和02-Lm-1、Archie、LMT 1107、Barmultra和Common 1,干物质产量在950g/m2以上.各品种苗期生长速度与第一茬产量不相关,刈割后1～2周内的再生速度与鲜草产量存在极显著的正相关,每茬刈时高度也与鲜草产量存在显著或极显著正相关.晚熟的四倍体品种后期营养生长较好.

Study on the Productive Adaptability of 38 Varieties of Annual Ryegrasses in Guangdong Area

The productive adaptability of 38 varieties of annual ryegrass in Guangdong area were studied.The results showed as follows: among all the varieties,the yield of fresh forage of the second cutting time was the highest,and the fourth cutting yield was the lowest,yield of the third cutting was litter more than those of the first cutting.There were 7 varieties,LMT 1107,Archie,Common 1,Barmultra,Jumbo,Sabroso and 01-Lm-1,whose total fresh forage yield of 4 cutting times were the highest,and they were more than 11.22 kg/m~2.There were 5 varieties,01-Lm-1,LMT 1107,Common 1,Archie and LWD 8181-2,whose total fresh yield of 3 cutting times were higher,and they were more than 10.17kg/m~2.It was the 01-Lm-1,LWD 8181-2,BAR 9 TAM,LMT 9034 and Jumbo,whose dry matter was the highest and they were more than 1011 g/m~2,and the next were Barprisma,Sabroso and 02-Lm-1,Archie,LMT 1107,Barmultra and Common 1,whose dry matter was more than 950 g/m~2.The varieties whose yield of fresh forage and dry matter were higher were 01-Lm-1,LWD 8181-2,Barprisma,Jumbo,Archie,LMT 1107,Sabroso and Barmultra,from high to low.The regeneration speed and the whole growth speed were significantly or very sinificantly correlative with the yield of fresh forage.The late-mature tetraploid varieties grew well during the late period in the experiment.