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采用植物生长分析法 ,对丘陵旱地甘薯豫薯 8号进行物质生产性能分析。结果表明 ,豫薯 8号的叶面积系数 (LAI)、相对生长率 (RGR)和净同化率 (NAR)均显著高于徐薯 18;在整个生长过程中 ,豫薯 8号的NAR有两个高峰期 ,分别为栽后的 5 0～ 70d和 90～ 10 0d ;第一个高峰期其NAR为 6 2 4g/ (m2 ·d) ,,比徐薯 18提高 2 0 2 % ;第二个高峰期NAR为 6 5 6 g/ (m2 ·d) ,比徐薯 18提高 13 5 %。豫薯 8号的叶面积比率 (LAR)则略低于徐薯 18。证明豫薯 8号有良好的物质生产性能 ,可作为徐薯 18的理想换代品种
The plant growth analysis method was used to analyze the material production performance of sweet potato Yushu 8 in hilly dry land. The results showed that leaf area index (LAI), relative growth rate (RGR) and net assimilation rate (NAR) of Yushu 8 were significantly higher than that of Xushu 18. During the whole growth period, The peak period was 50-70 days and 90-10 days respectively after transplanting; the NAR was 62.4 g / (m2 · d) in the first peak, which was 202% higher than that of Xushu 18; the second The peak NAR was 656 g / (m2 · d), an increase of 13 5% over that of Xushu 18. The leaf area ratio (YAR) of Yushu 8 was slightly lower than that of Xushu 18. Proved Yushu 8 has a good material production performance, can be used as an ideal substitute for Xushu 18