关键词: 硝基黄腐酸盐 硝酸盐 春小麦 抗旱

Abstract:

Utility efficiency of limited water on spring wheat under continuous drought stress condition, could be increased after spraying the solution of sodium nitro-fulvate three times before anthesis, after anthesis and grouting. The concentration of fulvic acid was set to be 50, 100 and 150 mg L^-1 which contained 1.1 g L^-1 of Na^＋. Spraying concentration set to be 50 mg L^-1 had the best effect on drought resistance. It could increase 9.4 % of yield when compared with CK, but decrease 13 % of water consumption. It could also increase 27.6 % of yield when compared with the treatment of spraying water. The germination percentage and water content of spring wheat could also be increased after its seed soaked by the solution, which showed that the effect is interaction between the two main components, sodium nitro-fulvate and sodium nitrate. However, spraying potassium nitro-fulvate, which contained 100mg L^-1 of fulvic acid and 1.8 g L^-1 of K^＋ led to decrease 7.6 % of yield when compared with the treatment of spraying water. It restrained the grow
wth of spring wheat.

Key words: nitro-fulvate, nitrate, spring wheat, drought resistance