Summer Root Decline
Summer Root Decline
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夏季根系衰退
DOI：
10.2135/cropsci2003.2580
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发表时间：
2003
期刊：
影响因子：
2.3
通讯作者：
Xiaozhong Liu
中科院分区：
文献类型：
--
作者：
Bingru Huang;Xiaozhong Liu
对匍匐翦股颖根系活力的季节动态进行了研究。= A.匍匐茎变种palustris（Huds.）Farw.]将有利于制定有效的育种和管理计划，以最大限度地提高夏季草坪质量。本研究的目的是研究动态变化的根生产和死亡率为4个匍匐禾草品种，不同的夏季拍摄性能。这项研究是在1997年和1998年在堪萨斯州曼哈顿进行的美国高尔夫球协会规范的绿色推杆上进行的。所评价的品种为'L-93'、'Penncross'、'Providence'和'Crenshaw'。每天割草4毫米，隔日灌溉。根生产和死亡率进行了监测，使用minirrectron技术。在这两年中，总根长和数量在8月最高，然后在9月下降的所有四个品种。7 ~ 9月，新生根的长度和数量减少，死根的长度和数量增加。所有品种的死根与活根的长度和数量的比例在夏末增加。虽然品种之间的差异，总根长和数量不一致的2年之间，Penncross始终有更多的死根，更少的新根，和更高的根死亡率与其他品种相比。结果表明，匍匐茎禾草夏季根系衰退的原因是新根产生量减少和根系死亡率增加，这可能与夏季土壤温度较高有关。根系产量和死亡率的变化可能是导致四个品种夏季表现差异的原因。
A better understanding of the seasonal dynamics of root activity for creeping bentgrass [Agrostis palustris Huds. = A. stolonifera var. palustris (Huds.) Farw.] would be beneficial for developing effective breeding and management programs to maximum summer turf quality. The objectives of this study were to examine dynamics changes in root production and mortality for four creeping bentgrass cultivars that differ in summer shoot performance. The study was conducted on a USGA-specification putting green in Manhattan, KS, during 1997 and 1998. The cultivars evaluated were 'L-93', 'Penncross', 'Providence', and 'Crenshaw'. Grasses were mowed daily at 4 mm and irrigated on alternate days. Root production and mortality were monitored using the minirhizotron technique. In both years, total root length and number were highest in August and then decreased in September for all four cultivars. From July to September, the length and number of newly produced roots decreased while those of dead roots increased. The ratio of dead roots to live roots in length and number increased in late summer for all cultivars. While the differences in total root length and number among cultivars were not consistent between 2 yr, Penncross consistently had more dead roots, fewer new roots, and higher root mortality compared with the other cultivars. The results indicate that summer root decline of creeping bentgrass resulted from both decreased new root production and increased root mortality, which could be associated with high soil temperatures during the summer. Variation in root production and mortality may contribute to the differences in shoot summer performance of the four cultivars.