论文部分内容阅读
马铃薯(Solanum tuberosum L.)的品质和产量受土壤肥力的影响很大。氮肥用量过高会延迟块茎膨大并增加冠根比。一些资料表明氮可起调节作用,促进或延迟块茎形成及增加或减少块茎数。据报道,在整个生育期中,氮对形成并保持最佳株冠,以维持块茎继续膨大起了主要作用.
The quality and yield of potato (Solanum tuberosum L.) are strongly influenced by soil fertility. Nitrogen fertilizer will delay tuber expansion and increase the ratio of crown to root. Some data suggest that nitrogen may play a regulatory role in promoting or delaying the formation of tubers and increasing or decreasing the number of tubers. It has been reported that nitrogen plays a major role in the formation and maintenance of the canopy throughout the growing season in order to maintain tuber enlargement.