The Responses of Chlorophyll Fluorescence Characteristics in Sweet Sorghum to Mixed Organic Liquid Fertilizer

doi:10.11924/j.issn.1000-6850.casb17020084

Abstract

Abstract: To clarify the effect of mixed organic liquid fertilizer on photosynthesis of forage crops in agro-pastoral ecotone of northern Shaanxi, the chlorophyll fluorescence characteristics of Sorghum bicolor were investigated after fertilization four concentration BMW solutions (i.e. B1, B2, B3 and B4 is each for 600, 400, 200 and 100 dilution times of BMW solution) and three concentration Aidoora solutions (i.e. A1, A2 and A3 is each for 1000, 500 and 300 dilution times of Aidoora solution) under potted experiment conditions. The results showed that: moderate levels of mixed organic liquid fertilizer significantly increased the maximum PSII quantum yield (Fv/Fm), active photochemical efficiency (ΦPSII), photochemical quenching (qP) and apparent electron transport rate (ETR), but significantly decreased the non-photochemical quenching (NPQ) in leaves of Sorghum bicolor under most single liquid fertilizer or mixed liquid fertilizer conditions, and the effects of mixed liquid fertilizer were more significant than single liquid fertilizer, which indicated that mixed organic liquid increased the PSII photochemical efficiency and apparent electron transport rate, but decreased the non-radiative energy dissipation. These results suggested that B2A2 was the most suitable mixed organic liquid fertilizer of the BMW and Aidoora solutions, and it could improve the PSII photochemical activity in the seedling leaves of Sorghum bicolor.

CLC Number:

S312

Xu Weizhou,Shi Lei,Wang Xiaolin,Bo Yaojun,Zhou Li and Kang Furen. The Responses of Chlorophyll Fluorescence Characteristics in Sweet Sorghum to Mixed Organic Liquid Fertilizer[J]. Chinese Agricultural Science Bulletin, 2017, 33(15): 25-31.

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