3Malik K A, Rakhshanda Bilal. Association of NitrogenFixing Plant Growth Promoting Rhizobateria (PGPR)with Kallar Grass and Rice [J]. Plant and Soil , 1997,194: 37~44.
4Shafiq Hussain, Mirza M S, Malik K A. Production of Phytohormones by the Nitrogen Fixation Bacteria Isloated from Sugarcan [J]. Biohorizons , 1999, 2 (1 - 4) :61~76.
5Dobereiner J, Day J M, Dart P J. Nitrogenase Activity and Oxygen Sensitivity of Paspalum notatum-Azotobacter Association [J]. J. Gen. Microbiol. 1972, 71:103~116.
6Van bertum, P, Bohloo B B. Evaluation of Nitrogen Fixation by Bacteria Association with Roots of Tropical Grasses [J]. Microbiol. Rew. 1980, 12 : 491~517.
7Malik K A, Zafar Y, Altaf Hussain. Nitrogenase Activity in the Rhizosphere of kallar Grass (Diplachne fusca (linn.)Beav ) [J]. Biologia. 1980,126(5):1~2.
8Abdul Wahid, Rasul E, Zafar Y, et al. Associative Nitrogen Fixation in Some Grasses and Cereals Growing Around Faisalabad Area [J]. Pak. J. Agri. Sci. , Vol 22(3), 1985.126~132.
9刘荣昌 李风汀.植物业际固氮与农业生产[J].微生物学杂志,1985,5(1):56-59.
10Crouch I J,Smith M T,VanS J,et al.Identification of Auxins in a commercial seaweed concentrate . J. Plant Physoil [J], 1992, 139: 590~594.