Effects of Ground Covers on Photosynthetic Characteristics, Antioxidant Indexes and Yield of Lycium barbarum

doi:10.11924/j.issn.1000-6850.casb2024-0258

Abstract

Abstract:

The paper aims to clarify the influence of different mulching materials on the photosynthetic characteristics, physiological characteristics and yield of Lycium barbarum in Ningxia region, and to provide theoretical basis and technical support for high yield, stable yield and high quality of L. barbarum in Ningxia region. A randomized block group experimental design was adopted, with four treatments: straw mulch (SM), horticultural ground mulch (HM), black mulch (BM), and natural grass mulch (CK), to study the change patterns of photosynthetic parameters, antioxidant characteristics and yield of L. barbarum leaves under different mulching materials. Mulching measures had significant effects on photosynthetic parameters, antioxidant enzymes, malondialdehyde content and yield of L. barbarum leaves. Among them, compared with CK treatment, the net photosynthetic rate (Pn) was significantly increased by 16.69% under HM treatment. At fruit bloom stage, superoxide dismutase (SOD) was significantly increased by 9.38% under HM treatment compared to CK treatment. At the full fruit stage, the malondialdehyde (MDA) content of CK treatment reached the maximum compared with other treatments. The yield of L. barbarum in HM treatment reached 1138.20 kg/hm², which was significantly higher than that in other treatments. Under HM treatment, the activity of antioxidant enzymes was higher and the content of MDA was the lowest, which could resist the external adverse environmental stress to a certain extent. Compared with CK, the contents of flavonoids, polysaccharides and betaine in L. barbarum under HM treatment were significantly increased by 102.86%, 19.03% and 75.93%. Horticultural ground cloth cover can effectively ensure higher values of photosynthetic parameters, antioxidant enzyme activity, improve the capture of light energy, absorption, and promote material transformation of L. barbarum to promote the photosynthesis of L. barbarum, and promote the transformation of dry matter, thus improving the yield and quality of L. barbarum.

Key words: Lycium barbarum, coverage measures, photosynthetic characteristics, antioxidant enzymes, malondialdehyde content, quality, yield

HONG Ziqiang, WANG Xiaoping, SU Ming, SU Li, BAI Liujing, ZHANG Zhengzhen, YANG Juan, WU Hongliang, KANG Jianhong. Effects of Ground Covers on Photosynthetic Characteristics, Antioxidant Indexes and Yield of Lycium barbarum[J]. Chinese Agricultural Science Bulletin, 2025, 41(1): 63-68.

Figures/Tables 6

References 31

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处理	措施
秸秆覆盖(SM)	使用粉碎成5~10 cm的玉米秸秆，沿枸杞树行内树盘地表覆盖，宽度1.5 m，覆盖厚度4~6 cm
园艺地布覆盖(HM)	沿果树树干株间方向，两侧分别铺设宽度为1.2 m、厚度为2 mm的园艺地布于地表，株间用土压实
黑膜覆盖(BM)	沿果树树干株间方向，两侧分别铺设宽度为1.2 m、厚度为0.5 mm的黑色塑料薄膜于地表，株间用土压实
自然生杂草覆盖(CK)	枸杞果园试验田自然生杂草，优势草为灰绿藜

处理	措施
秸秆覆盖(SM)	使用粉碎成5~10 cm的玉米秸秆，沿枸杞树行内树盘地表覆盖，宽度1.5 m，覆盖厚度4~6 cm
园艺地布覆盖(HM)	沿果树树干株间方向，两侧分别铺设宽度为1.2 m、厚度为2 mm的园艺地布于地表，株间用土压实
黑膜覆盖(BM)	沿果树树干株间方向，两侧分别铺设宽度为1.2 m、厚度为0.5 mm的黑色塑料薄膜于地表，株间用土压实
自然生杂草覆盖(CK)	枸杞果园试验田自然生杂草，优势草为灰绿藜

处理	Pn/[μmol/(m²·s)]	Ci/(μmol/mol)	Tr/[mmol/(m²·s)]	Gs/[mmol/(m²·s)]	WUE/(μmol/mol)
SM	20.25±1.06b	339.62±5.88a	9.94±0.33a	0.45±0.04b	2.04±0.07a
HM	21.19±1.79a	341.25±7.95a	10.11±0.72a	0.51±0.05a	2.10±0.07a
BM	17.25±1.11d	319.07±10.07c	8.19±0.87b	0.31±0.07d	2.11±0.10a
CK	18.16±0.80c	326.11±13.99b	8.56±0.91b	0.35±0.05c	2.13±0.14a

处理	Pn/[μmol/(m²·s)]	Ci/(μmol/mol)	Tr/[mmol/(m²·s)]	Gs/[mmol/(m²·s)]	WUE/(μmol/mol)
SM	20.25±1.06b	339.62±5.88a	9.94±0.33a	0.45±0.04b	2.04±0.07a
HM	21.19±1.79a	341.25±7.95a	10.11±0.72a	0.51±0.05a	2.10±0.07a
BM	17.25±1.11d	319.07±10.07c	8.19±0.87b	0.31±0.07d	2.11±0.10a
CK	18.16±0.80c	326.11±13.99b	8.56±0.91b	0.35±0.05c	2.13±0.14a

处理	类黄酮含量	多糖含量	甜菜碱含量
SM	0.044±0.003b	2.839±0.148ab	0.054±0.003c
HM	0.071±0.003a	3.121±0.057a	0.095±0.007a
BM	0.038±0.002b	2.755±0.202ab	0.061±0.010bc
CK	0.035±0.007b	2.622±0.088b	0.054±0.003c