In order to study the effect of different application amount of slow-release potassium fertilizer surueyed on the growth of tomato hole tray seedlings.In this experiment,we studied the influence of the physical and chemical properties of the matrix applying HA-K for the emergence rate and growth of tomato seedlings with 72 hole plug-seedling.The results showed that on the basis of adding a fixed amount of urea formaldehyde (2.8 g/L),calcium-magnesia phosphate fertilizer (4.0 g/L) and calcium superphosphate fertilizer(2.0 g/L),emergence rate of the tomato seedlings,plant height,stem thickness and healthy index of T3 treatment(when the content of potassium humate was 4.8 g/L) were obviously higher than the control group;T1 treatment(when the content of potassium humate was 0 g/L),which chlorophyll content was obviously higher than the control group.With the increase of the number of days after planting the matrix of the electrical conductivity value showed a trend of gradual decline of T3 treatment,then decreased to 0.17 mS/cm after 40 days sowing.The pH of the treatments were all above 7.0 after 40 days sowing.Comprehensive analysis of the above results indicated that,T3 treatment was the most suitable treatment for cultivating strong tomato seedlings,the reason of high pH about matrix still needed further research.%为了研究不同施用量缓释钾肥对番茄穴盘苗生长的影响,采用72孔穴盘育苗,研究了腐植酸钾施用量对番茄幼苗出苗率、生长指标及基质理化性质的影响.结果表明:在施用脲甲醛肥2.8 g/L、钙镁磷肥4.0 g/L、过磷酸钙2.0 g/L的基础上,T3处理(腐植酸钾施用量为4.8 g/L)番茄幼苗的出苗率较高,长至两叶一心后株高、茎粗及壮苗指数均显著高于对照(未加任何肥料);T1处理(腐植酸钾施用量为0 g/L)叶绿素含量显著高于对照;T3处理基质电导率随播种后天数的增加呈逐渐下降趋势,播种后40 d降低到0.17 mS/cm;播种后40 d各处理基质pH值仍均在7.0以上.综合分析,T3处理最适合番茄培育壮苗,但对于基质pH值偏高的原因仍需进一步研究确定.
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