腐植酸钾对玉米生长发育和产量构成因素的影响

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=0.8434～0.9997。浸种和叶面喷施平均株高、穗位高、茎粗比对照增加5.04cm、5.12cm和0.072cm；穗长、穗粗增加0.983cm和0.2616cm；穗粒数、千粒重增加57.74粒和28.303g；秃顶率下降3.164个百分点，产量提高24.79%。在本试验条件下，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576.6～1369.7mg/kg，叶面喷施903.4～1617.9mg/kg。

Effect of HA-K on Corn Development and Factors Forming Yield

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