（1College of Horticulture，Henan Agricultural University，Zhengzhou 450002，Henan，China；2Seed Technology Extension Station of Pingdingshan City，Pingdingshan 467000，Henan，China）
The experiment studied the effects of biochar addition on tomato seedling growth and nutrient
uptake by adding biochar with different ratio（ 1∶1 mixture of wheat straw and peanut shell carbonized by high
temperature）into tomato nursery substrate. The result indicated that adding biochar（ 10%-30%） could improve
vent ability，reduce unit weight，increase pH value and EC value of nursery substrate. Compared with the
contrast，adding 20% biochar could significantly improve the stem thickness，healthy seedling index，root-shoot
ratio，chlorophyll content and root system activity of tomato seedlings by 24.29%，62.87%，31.29%，54.87%
and 26.86%，respectively．Besides，biochar addition in nursery substrate could also increase the absorption and
accumulation of N，P and K nutrients by tomato seedlings，which was very helpful for tomato seedling growth.
