保水剂与养分交互作用对番茄幼苗生长的影响

保水剂与全营养肥交互作用对番茄幼苗生长的影响表明：基质持水量随着保水剂浓度的增加而增加，但随着养分供应浓度的增加，基质持水量并未随着保水剂浓度的增加而呈直线上升。基质EC值随养分浓度增加而极显著增加．随保水剂浓度增加而显著下降。基质pH值随着养分浓度的变化范围较小，随着保水剂浓度的变化而发生极显著变化，表现为随着保水剂浓度的增加，基质pH值增加。通过对番茄幼苗的形态指标测定，表明在每1L基质中加入2g全营养肥，番茄幼苗生长较为茁壮；保水剂浓度在每1L基质中加入2g较为适宜番茄幼苗生长。在养分浓度和保水剂浓度适中的条件下．两者的交互作用可提高番茄幼苗的根系活力和叶片的叶绿素含量。综合各因素认为，A2B2处理为最优处理，即全营养肥2g／L，保水剂浓度2g／L时，较适合番茄幼苗生长。

Study on Interaction Effects of Water Retaining Gel and Fertilizers on Tomato Seedling

The Interaction Effects of water retaining gel and full nutrition fertilizers of tomato seedling were studied. The results showed that： among the days of sowing, water content of substrate was always increasing by the amount of sky gel water retaining gel increased, but it didn＇t showed the exactly positive linear correlation when the content of fertilizers increased. The water retention capacity preserved showed a little bit of declination when the content of fertilizers increased. The EC of substrate was increasing while the content of fertilizers increased （p=0.01）, meanwhile pH of substrate was declining while the content of fertilizers increased （p〈0.05） and pH of substrate was increasing while the content of water retaining gel increased （p=0.01）. The treatment of 2 g/L full nutrition fertilizers and 2 g/L sky gel water retaining gel is the best, the interaction of them is favorable for tomato seedling growth.