Effects of Plant Growth Regulators on Pecan Rejuvenation Period

In this experiment, the effects of different plant growth regulators on different pecan varieties rejuvenation period were studied preliminary. Results showed that plant growth regulators had effects on both growth and blossom after grafting of pecan; also this kind of effects had very big relations with plant varieties. Plant growth regulators had the best effect on Pawnee, the ABT 50 mg·L-1 or NAA 200 mg·L-1 treatment had the best effect, which can be used in production after further test. Both the ABT and NAA had some effect on early blossom of Western and Mahan, but had no obvious effect on growth. Further experiments were necessary to research on varieties and dosage of plant growth regulators according to different pecan varieties.