草坪型高羊茅种子成熟过程中活力变化及适宜收获期研究  

Effects of Seed Maturity of Turf-type Tall Fescue on Vigor and the Optimal Harvesting Time

作　　者：徐荣[1] 韩建国[1] 

机构地区：[1]中国农业大学草地研究所,北京100094

出　　处：《中国农业科学》2003年第7期834-839,共6页Scientia Agricultura Sinica

基　　金：农业部"948"资助项目 (2 0 2 0 99)

摘　　要：通过对草坪型高羊茅种子成熟过程中加速老化后发芽率、发芽指数、活力指数、种苗芽长和芽重、电导率、脱氢酶活性、ATP含量及酸性磷酸酯酶活性等的测定 ,对高羊茅种子成熟过程中活力的变化进行了研究。结合种子含水量和产量变化 ,确定高羊茅种子适宜收获期。结果表明 ,高羊茅种子活力随着成熟度的增加而提高。在盛花期后 19d ,活力水平已达较高水平 ,直到盛花后 31d ,一直保持着高活力水平。盛花期后 2 5d ,种子含水量为32 .19%,种子活力高 ,种子产量最高 ,达 35 33kg·ha-1。盛花期后 2 3～ 31d ,种子含水量 40 %～ 12 .43%,产量达 330 0kg·ha-1以上 ,此为适宜的种子收获期 ,可获得高产、优质的高羊茅种子。By determination on accelerated aging germination, germination index, vigor index, seedling length, seedling weight, electric conductivity, dehydrogenase activity, ATP content and acid phosphoesterase activity during seed development of turf-type tall fescue, the seed vigor of tall fescue were studied. Combined with seed moisture content and yield, the optimal harvesting time of tall fescue was determined. The result indicated that the seed vigor increased continuously along with seed maturity, and the higher seed vigor was achieved at 19th day after peak anthesis and maintained continuously until 31st day after peak anthesis. At 25th day after peak anthesis, the highest yield of 3 533 kg·ha -1 and the good quality of seed of tall fescue were harvested with 32.19% moisture content. From 23rd to 31st day after peak anthesis, the seed yield of 3 300 kg·ha -1 and the good seed quality of tall fescue were harvested with 40%-12.43% moisture content, and the span was the optimal harvesting time.

关 键 词：草坪型高羊茅 种子 成熟过程 活力变化 收获期 发芽率 发芽指数 活力指数 种苗芽长 

分 类 号：S688.4[农业科学—观赏园艺]