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In order to explore the effects of fertilization on the phenological period of the mother tree of Larch seed garden, this study selected the mother tree of Larch seed garden of 1. 5 generation and 2 generation as the research object. Different proportions and doses of nitrogen, phosphorus and potassium fertilizer were used as experimental treatments to observe and analyze the phenological phases of the mother tree, such as bud expansion, bud spreading, bud capping, male flower bud emergence and male flower flowering. The results showed that fertilization had little effect on bud growth, and the bud growth of main branches was mainly concentrated between April 18 and April 20. Fertilization had a certain effect on bud development, among which, the beginning of main bud development was mainly concentrated from April 26 to April 30, and the complete leaf development of main bud was mainly concentrated from May 20 to May 24. Fertilization treatment had a certain effect on bud capping. The beginning of bud capping of main branch mainly began from August 17 to 27. The complete capping of main shoots mainly occurred from August 26 to September 9. Fertilization also had a certain impact on the growth period. The growth period of different fertilization treatments varied from 131d to 143 d. The onset of flowering of male flowers was mainly concentrated from April 13 to April 18, with a difference of 5d between treatments. The peak flowering period of male flowers was mainly concentrated from April 16 to April 22, with a difference of 6d among different treatments. The final flowering period of male flowers was mainly concentrated from April 19 to April 26, with a difference of 7 d among different treatments. Fertilization had a certain effect on the flowering period, which varied from 6d to 8d among different treatments. Range analysis showed that no matter the growth phenology or flowering phenology, the effects of different kinds of fertilizers were N fertilizer, P fertilizer and K fertilizer in the order from large to small. The application of medium amount of N fertilizer and P fertilizer, and high amount of K fertilizer was beneficial to the growth and flowering of the mother tree of larch seed orchard. The results provided theoretical support and technical reference for the rational fertilization of larch seed orchard and the improvement of seed yield and quality of larch mother tree. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of Botanical Research is the property of Bulletin of Botanical Research Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bulletin of Botanical Research is the property of Bulletin of Botanical Research Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Southern Agriculture is the property of Journal of Southern Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objectives] This study aims at exploring the effects of growth regulators on floral differentiation, expression of flowering related genes and nutrient accumulation of pear hybirds. [ Methods] This study took 'Mantianhong' x 'Dangshansuli' progenies as materials, and all the individuals were five years old but still have no flower. We sprayed the 6-BA and ethephon( Eth) (100 mg·kg-1 6-BA, 100 mg · kg-1 Eth, 100mg ·kg-1 6-BA+1 00 mg · kg-1 Eth) with water control during the period of flower bud differentiation. [Results] All different growth regulator treatments can facilitate the florescence of the progenies. The mixed 6-BA and ethephon treatment increased the most flower buds among three treatments. All treatments promoted the expression of FLOWERING LOCUS T( FT) and LEAFY(LFY) genes during floral bud differentiation, and inhibited the expression of TERMINAL FLOWER 1(TFL1) gene; the treatments enhanced the content of ZT and ABA, reduced the hormone content of GA3 and IAA, and improved the content of starch and the ratio of C/N in floral buds. [Conclusions] The synthesis analysis revealed that gene expression, endogenous hormone and nutriment influenced each other, and they regulated floral initiation of hybrid progenies together. [ABSTRACT FROM AUTHOR]