灌溉水平及灌溉间隔对大豆植株干物质积累的影响

采用桶栽方法,选用黑农48为试验材料,设计4个灌溉水平及4种干旱胁迫历时进行交叉试验,研究了灌溉水平及干旱胁迫历时对大豆干物质积累的影响。结果表明,花荚期大豆植株叶、茎、根和荚果更易受干旱胁迫历时影响,干旱胁迫历时越短越有利于植株生长,灌溉水平对植株的生长影响相对弱于干旱胁迫历时。植株各器官干质量的等高线图表明高灌溉水平、短干旱胁迫历时比低灌溉水平、长干旱胁迫历时有绝对优势,同时也表现出高灌溉水平、长干旱胁迫历时处理与低灌溉水平、短干旱胁迫历时处理之间具有相似性。

EEffect of Irrigation Schedule of Dry Matter of the Shoots of Soybean

We investigated the impact of irrigation schedule and drought on dry-matter accumulation in Heinong 48 soybean using pot experiments under combinations of four irrigation schedules and four drought treatments.The results showed that the growth of leaf,stem,root and pod of the soybean was strongly affected by duration of the drought occurring at the pod stage,and that the shorter the drought lasted,the better soybean could recover.In comparison with drought,the impact of the amount of irrigation on the soybean was insignificant.We also found that the impact of the combination of high irrigation amount and long-lasting drought is similar to the effect of low irrigation combined with short-lasting drought.