Rooting Impact Factors of Callicarpa nudiflora Softwood Cuttings

doi:10.7525/j.issn.1673-5102.2016.05.015

Abstract

Abstract: With two-year softwood cuttings, five experiments were conducted to study the effects of substrate, cutting portion, style of keeping leaves, cutting season, different types and contents of exogenous hormones on rooting of Callicarpa nudiflora cuttings. Rooting rate, hyponastic rate, rooting number and the maximum root length were measured, and a subordinate function value was used to comprehensively evaluate the rooting quality. The optimum substrate among the eight treatments was peat soil:vermiculite:river sand=2:1:1 in volume ratio, and the rooting rate and average rooting number were 74% and 5.4, respectively. The upper and middle portion of cutting were more easily for rooting than the bottom portion, but the middle portion was ranked the best. Cuttings with leaves significantly produced a higher rooting rate with comparison of leaves off. Cuttings with a pair of half leaf got the maximum rooting rate of 64%. Autumn(mainly in September) was the optimal season for cutting and its rooting number and maximum root length were significantly higher than that of spring(April) and summer(July). The cutting effect of IBA treatments within four concentration levels were all superior to that of IAA and NAA treatments. Cuttings treated with IBA(1 000,1 500 mg·L^-1) showed better rooting quality significantly, while cuttings treated with high concentration levels of NAA(2 000,2 500 mg·L^-1) were obviously not conducive to root.

Key words: Callicarpa nudiflora, medicinal plant, softwood cutting, rooting, impact factors

CLC Number:

Q949.777.5

LIU Shi-Chao, ZHOU Zai-Zhi, ZHANG Jin-Hao, LIANG Kun-Nan, MA Hua-Ming, HUANG Gui-Hua. Rooting Impact Factors of Callicarpa nudiflora Softwood Cuttings[J]. Bulletin of Botanical Research, 2016, 36(5): 739-746.

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