5Amos Naor, Yoni Gal, Moti Peres. The inherent variability of water strtess indicators in apple,nectarine and pear orchards, and the validity of a leaf - selection procedure for water potential measurements [ J ]. Irrigation Science, 2006,24 : 129 - 135.
6D A Goldhamer, E Fereres. Irrigation scheduling of almond trees with tunk diameter sensor[ J ]. Irrigation Science ,2004,23 : 11 - 19.
7Damiano Remorini, Rossano Massai. Comparision of water status indicators for young peach trees[ J]. Irrigation Science,2003,22:39-46.
5Brown L R, Halweil B. China's water shortage could shake world food security[J]. World Watch, 1998,11(4):10-21.
6Seckler D, Barker R, Amarasinghe U. Water scarcity in the twenty-first century[J]. Water Resources Development, 1999,15(1-2):29-42.
7Li Yuanhua. Strategies for managing water scarcity in China until 2030,water-saving agriculture and sustainable use of water and land resources[M]. Xi'an: Shaanxi Science and Technology Press,421-427.