作物学报 ›› 2013, Vol. 39 ›› Issue (01): 126-132.doi: 10.3724/SP.J.1006.2013.00126
黄巧义,唐拴虎*,陈建生,张发宝,解开治,黄旭,蒋瑞萍,李苹
HUANG Qiao-Yi,TANG Shuan-Hu,CHEN Jian-Sheng,ZHANG Fa-Bao,XIE Kai-Zhi,HUANG Xu,JIANG Rui-Ping,LI Ping
摘要:
以传统品种华南205及新育品种华南5号为材料,通过田间试验,研究了木薯生物量与产量累积规律,探讨了品种改良及施肥措施对木薯物质形成规律的影响。结果表明,不同品种生物量累积动态相似,生长前期生物量累积缓慢,且以地上部分为主,到8月中下旬块根快速生长,物质累积速率迅速提高,累积重心由地上部逐渐转移到地下部; 不同品种间物质累积速率及分配比例有所差异,分枝早且多、茎叶生长旺盛的大株型品种(华南5号)物质累积速率大于小株型品种(华南205),但地上部分生物量比例相对较高,降低了收获指数。氮素是木薯物质形成累积的主要养分限制因子,其次是钾素,磷素影响最小。氮、磷、钾配合施用(1.0∶0.4∶1.0)可显著提高木薯物质累积速率及产量,不同木薯品种物质累积对施肥依赖程度不同,可能与品种的营养需求量、根系发达程度有关。
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