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Citation:

The Role of Increased Precipitation in Promoting Branch and Leaf Growth of Nitraria tangutorum

  • Received Date: 2011-01-12
  • A rain-increasing test with different ratios of precipitation (0%, 25%, 50%, 75%, 100%) were conducted on natural Nitraria tangutorum shrubland based on the mean annual precipitations at the northeast margin of Ulan Buh Desert (Dengkou of Inner Mongolia, 145 mm) and southeast margin of Badan Jaran Desert (Minqin of Gansu Province, 115 mm). The results showed that the more the precipitation increased, the more the change of morphological traits of N.tangutorum. The effect of 100% precipitation-increasing on morphological traits of N.tangutorum was significant both at Dengkou and Minqin: including length, diameter and dry biomass of marked branch, but not including the amount of mature leaf or new leaf. Fresh biomass and dry biomass of branch and leaf of N.tangutorum were also enhanced by increased precipitation in September both at Dengkou and Minqin. More increased precipitation could promote branch growth of N.tangutorum in more arid area. The biomass of N.tangutorum was enhanced by 50% increased precipitation in late summer in Dengkou. However, it was enhanced by 75% increased precipitation in late summer in Minqin.
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The Role of Increased Precipitation in Promoting Branch and Leaf Growth of Nitraria tangutorum

  • 1. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China

Abstract: A rain-increasing test with different ratios of precipitation (0%, 25%, 50%, 75%, 100%) were conducted on natural Nitraria tangutorum shrubland based on the mean annual precipitations at the northeast margin of Ulan Buh Desert (Dengkou of Inner Mongolia, 145 mm) and southeast margin of Badan Jaran Desert (Minqin of Gansu Province, 115 mm). The results showed that the more the precipitation increased, the more the change of morphological traits of N.tangutorum. The effect of 100% precipitation-increasing on morphological traits of N.tangutorum was significant both at Dengkou and Minqin: including length, diameter and dry biomass of marked branch, but not including the amount of mature leaf or new leaf. Fresh biomass and dry biomass of branch and leaf of N.tangutorum were also enhanced by increased precipitation in September both at Dengkou and Minqin. More increased precipitation could promote branch growth of N.tangutorum in more arid area. The biomass of N.tangutorum was enhanced by 50% increased precipitation in late summer in Dengkou. However, it was enhanced by 75% increased precipitation in late summer in Minqin.

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