黄腐酸拌种对春小麦产量和水分利用效率的影响

Effect of mixing seed with fulvic acid on spring wheat yield and its water use efficiency.

在大田研究了黄腐酸拌种对春小麦产量形成和水分利用效率的影响 .实验设 4个处理 :对照 (CK) ,播种前种子不处理 ;FA处理 :播种前用FA拌种 ;WM处理 :浇 30mm底墒水 ,覆膜 ;处理WMFA :浇 30mm底墒水 ,覆膜 ,播种前用FA拌种 .2个覆膜处理均在播种后 6 2d揭膜 .同CK相比 ,FA拌种后 ,根系生长良好 ,吸收利用了更多的土壤水分 ,增加了穗重、单穗籽粒重和收获指数 ,产量和水分利用效率均显著提高 .WM和WMFA在耗水量上相差无几 ,都充分利用了底墒 ,但WMFA处理提高了水分利用效率 ,产量也较高 .CK、FA、WM、WMFA 4个处理的产量分别为 917.7、12 75 .1、12 6 9.4、1737.1kg·hm-2 ;水分利用效率分别为 6 .5 8、7.85、6 .2 0、9.0 5kg·hm-2 ·mm-1.

Four treatments were installed to study the effect of seed mixed with fulvic acid on sring wheat yield and water use efficiency:CK(without any treatment of fulvic acid);FA(seeds were mixed with fulvic acid before sowing),WM(pre sowing irrigation of 30mm plus clear plastic film mulch),and WMFA(pre sowing irrigation of 30mm plus plastic film mulch, and seeds were mixed with fulvic acid before sowing).The plastic film mulches in WM and WMFA treatments were removed after sowing for 62 days.Compared to treatment CK,the spring wheat in FA treatment grew more roots and absorbed more water from soil,and increased the spike weight and grain weight per spike and harvest index,which resulted in a higher yield and higher water use efficiency.There was no differnece in water consumption between treatments WM and WMFA,but in treatment WMFA,more dry matter was distributed in shoots,and hence yield and water use efficiency were improved sinificantly.The yields for the four treatments CK,FA,WM,WMFA were 917.7,1275.1,1269.4,1737.1kg·hm -2 , respectively; and the water use efficiencies were 6.58, 7.85, 6.20, 9.05kg·hm -2 ·mm -1 ,respectively.