Effect of plant growth regulator on seed yield of Dactylis glomerata

doi:10.11686/cyxb2018729

Abstract

Abstract: The testing of plant growth regulator (PGR) yielded new insight to improve the seed yield of forage crops. In this study, two PGRs [chlorocholine chloride (CCC): 500, 750, 1000, and 1250 g·ha^-1; trinexapac-ethyl (TE): 100, 200, 300, and 400 g·ha^-1] and their mixtures (500+50, 500+150, 1000+50, 1000+150, 1000+150, 1000+150 g·ha^-1) were applied to Dactylis glomerata to evaluate the effect on the seed yield over two years of field trials. The results showed that both growth regulators and their mixtures used in this study increased the seed yield of D.actylis glomerata. The mixture of CCC+TE (500+150 g·ha^-1) resulted in the largest seed yield, which was an increase of 46.2% compared to control plots (without any PGR treatment). The main mechanism for action of the PGR was to increase the fertile tillers per unit area and seed setting rate in the field. The use of PGR had no significant effect on seed weight or on floret number per spike.

Key words: Dactylis glomerata, plant growth regulator, seed yield, trinexapac-ethyl, chlorocholine-chloride

ZHANG Xu, NIE Gang, HUANG Lin-kai, TANG Lu, ZHOU Zhou, LIU Fu, ZHOU Jie, ZOU Jing, REN Si-yan, ZHANG Xin-quan. Effect of plant growth regulator on seed yield of Dactylis glomerata[J]. Acta Prataculturae Sinica, 2019, 28(6): 93-100.

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