【摘要】 试验结果表明 ,腐植酸钾 (HA -K)对玉米生长发育、产量构成因素以及产量均有显著的促进作用。浸种浓度与幼苗生长量呈正相关 ,r =0 84 34～ 0 9997。浸种和叶面喷施平均株高、穗位高、茎粗比对照增加 5 0 4cm、 5 12cm和 0 0 72cm ;穗长、穗粗增加 0 983cm和 0 2 6 16cm ;穗粒数、千粒重增加 5 7 74粒和 2 8 30 3g ;秃顶率下降 3 16 4个百分点 ,产量提高 2 4 79%。该试验条件下 ,HA -K对玉米植株性状和产量构成的影响X2 >X1,使各性状达最佳状态的HA -K使用浓度为 :浸种 5 76 6～ 136 9 7mg kg ,叶面喷施 90 3 4～ 16 17 9mg kg。更多还原

【Abstract】 HA-K produced a great on corn development and factors forming yield The results indicated that there was greatly relativity (from o 8434 to 0 9997)between seed soaked with diffrent concentration of HA-K and seedling development, that average plant height, ear-site Height , stem thickness, ear lengh, number of grains in a ear, weight per 1000 corn grains and total yield increased in turn by 5 04 cm, 5 12 cm, 0 072 cm, 0 983 cm, 0 2616 cm, 57 74 grains,28 303 gram And 24 79 per cent than the control But the bare top of corn ear decreased by 3 164 per cont than the control The effect of concentration X2 On development and factors forming yield exceeded that of concentration X1 And optimum concentration of HA-K as follows: from 576 6 to 1369 7 mg/kg as seed soaked with it;From 903 4 to 1617 9 mg/kg as it was sprayed on corn leaves更多还原