Root Distribution Features of Stump Grafting Poplar Plantations

Abstract

Abstract: An experiment was conducted to study the special root distribution of stump grafting poplar plantations comparing with two forestation poplar plantations whose underground and aboveground part was the same as the stump grafting poplar respectively in Daxing District .This experiment used a full excavation method to get the total root biomass and root model and soil pillars to obtain the absorption root (fine root ≤ 2mm,crude root 2-10mm ). Results showed that the total root biomass of stump grafting poplar plantations were 1.83 and 7.38 times more than two forestation plantations respectively.It's roots were quite many and stout,the model of roots form was combined horizontal and plagiotropic type and the two forestation plantations'roots model was horizontal type.The total fine root and crude root biomass of stump grafting poplar plantations were 86.27% and 224.65%,59.06% and 65.86% more than two forestation plantations.The vertical and horizontal distribution of absorbing root of stump grafting poplar were abnormal in soil surface layer comparing with two forestation poplar plantations.The biomass of fine root in 0-10cm was a lot and the 10-20cm was a little.In 0-20cm among plants,the root was quite a lot. This conclusion provided further microcosmic explanations of the growth advantages of stump grafting poplar plantations.

Key words: Daxing, stump grafting, poplar, root, distribution features

CLC Number:

S792.11

WU Lijuan, YU Lingxiao, JIA Suping, SONG Jiqin, JIA Liming, SI Jing. Root Distribution Features of Stump Grafting Poplar Plantations[J]. FOREST RESOURCES WANAGEMENT, 2012, 0(3): 113-118.

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