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A Study on Distribution of Root System of Populus×euramericana cv. ‘74/76’ Plantation with Ground Drip Irrigation

  • Received Date: 2013-01-06
  • Aiming at studying the growth and development of root system as well as its distribution of poplar plantation with ground drip irrigation cultivation (DIC), a comprehensive survey was conducted with methods of digging out whole root system of individual and digging out root pieces in different vertical and horizontal locations in the soil of 2-year-old poplar plantation with DIC and conventional irrigation cultivation (CIC) at sandy land of the former Yongding River watercourse in Beijing. A systematic analysis was made on the quantity, length and biomass of individual and stand root system as well as their vertical and horizontal distribution characteristics under the two cultivation conditions. The conclusions of study are as follows: (1) The depth of poplar taproot with DIC is 1.3 m, while that with CIC is 4.5 m, the distribution range of lateral roots of poplar with DIC is 1.8 times and 1.2 times that of CIC in direction along row and cross row, respectively. The quantity of lateral roots of poplar with DIC is 2.0 times that of with CIC. (2) The total length and biomass of individual root system of poplar with DIC is 1.8 times and 1.2 times that of with CIC respectively, while the total length and biomass of taproot and level-I lateral roots of poplar with DIC are similar to those with CIC, and the total length and biomass of level-Ⅱ lateral roots and level-Ⅲ lateral roots of poplar with DIC are far more than those with CIC. (3)The stand root system and biomass of poplar with DIC is 2.0 times and 1.1 times that of with CIC respectively, while the total length and biomass of the roots with diameter of 5≤DD D≥15 mm of poplar stand with DIC are similar to those with CIC, and the total length and biomass of the roots with diameter of DDDDDD<1 mm) of poplar stand with CIC relatively distributes in the soil around the tree.
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A Study on Distribution of Root System of Populus×euramericana cv. ‘74/76’ Plantation with Ground Drip Irrigation

  • 1. World Bank Loan Project Office, Chinese Academy of Forestry, Beijing 100091, China
  • 2. Forest Farm of Daxing District, Beijing 102602, China

Abstract: Aiming at studying the growth and development of root system as well as its distribution of poplar plantation with ground drip irrigation cultivation (DIC), a comprehensive survey was conducted with methods of digging out whole root system of individual and digging out root pieces in different vertical and horizontal locations in the soil of 2-year-old poplar plantation with DIC and conventional irrigation cultivation (CIC) at sandy land of the former Yongding River watercourse in Beijing. A systematic analysis was made on the quantity, length and biomass of individual and stand root system as well as their vertical and horizontal distribution characteristics under the two cultivation conditions. The conclusions of study are as follows: (1) The depth of poplar taproot with DIC is 1.3 m, while that with CIC is 4.5 m, the distribution range of lateral roots of poplar with DIC is 1.8 times and 1.2 times that of CIC in direction along row and cross row, respectively. The quantity of lateral roots of poplar with DIC is 2.0 times that of with CIC. (2) The total length and biomass of individual root system of poplar with DIC is 1.8 times and 1.2 times that of with CIC respectively, while the total length and biomass of taproot and level-I lateral roots of poplar with DIC are similar to those with CIC, and the total length and biomass of level-Ⅱ lateral roots and level-Ⅲ lateral roots of poplar with DIC are far more than those with CIC. (3)The stand root system and biomass of poplar with DIC is 2.0 times and 1.1 times that of with CIC respectively, while the total length and biomass of the roots with diameter of 5≤DD D≥15 mm of poplar stand with DIC are similar to those with CIC, and the total length and biomass of the roots with diameter of DDDDDD<1 mm) of poplar stand with CIC relatively distributes in the soil around the tree.

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