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黄腐酸钾对罗汉果叶片光合特性及果实品质的影响

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探讨黄腐酸钾施用对罗汉果叶片光合特性和果实品质的影响,可为提高武陵山地区罗汉果种植品质提供参考.以"青皮果"罗汉果组培苗为材料,株距2.0 m,行距2.5 m定植后,设置黄腐酸钾60、90、120、150 kg/hm2等4个处理,以不施用黄腐酸钾为对照,在二级侧蔓长出5~7片叶时测定比较不同处理叶片的叶绿素a、叶绿素b和类胡萝卜素等光合色素含量,净光合速率日变化,光响应参数,叶绿素荧光动力学参数,果实纵横径、甜苷V含量等指标.结果表明,黄腐酸钾能促进叶片光合色素含量增加,提高叶片光饱和点、净光合速率,提升叶片光量子传递能力,均以120 kg/hm2处理的叶片光合指标最高.120 kg/hm2处理的果实纵横径、单果干质量和甜苷V含量较高,分别比对照提高11.77%、9.6%、11.95%和18.98%.说明施用黄腐酸钾能提高罗汉果叶片的光合能力,促进果实增大和罗汉果甜苷V积累,本试验条件下施用量以120 kg/hm2较适宜.
Effect of potassium fulvic acid on photosynthetic characteristics of leaf and fruit quality of Siraitia grosvenorii
To explore the effect of potassium fulvic acid on leaf photosynthetic characteristics and fruit quality of Siraitia grosvenorii,and provide reference for high-quality and high-yield cultivation of S.grosvenorii in Wuling Mountain Region,the tissue culture seedlings of'Qingpi Guo'S.grosvenorii was used as the experi-mental material planted with plant space of 2.0 m and row space of 2.5 m.Four treatments of potassium fulvic acid were set up,including the amount of potassium fulvic acid of 60 kg/hm2,90 kg/hm2,120 kg/hm2 and 150 kg/hm2,with no application of potassium fulvic acid as control.The contents of photosynthetic pigments(chlorophyll a,chlorophyll b and carotenoids),diurnal changes of net photosynthetic rate,light response pa-rameters,chlorophyll fluorescence kinetic parameters of leaves,and the fruit size and content of mogroside V of fruits were measured and compared when five to seven leaves appeared on the secondary lateral bine.The results showed that potassium fulvic acid could increase the content of photosynthetic pigment in leaves and the leaf light saturation point,and enhance the leaf light quantum transfer ability.The treatment of 120 kg/hm2 potassium fulvic acid showed the highest photosynthetic indexes,with larger fruit vertical and horizontal diam-eter,higher dry weight of single fruit and mogroside V content,which increased by 11.77%,9.6%,11.95%and 18.98%,respectively,compared with the control.Potassium fulvic acid could improve the photosynthetic capacity of S.grosvenorii leaves,promote fruit enlargement and accumulation of mogroside V.The appropri-ate application rate was 120 kg/hm2.

Siraitia grosvenorii(Swingle)potassium fulvic acidphotosynthetic characteristicschlorophyll fluorescencedry weight of single fruitmogroside V

康公平、张宁、王永全、尚显希

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湖南人文科技学院农业与生物技术学院,湖南娄底,417000

铜仁学院/贵州省梵净山地区生物多样性保护与利用重点实验室,贵州铜仁,554300

铜仁金兰生态农业开发有限责任公司,贵州铜仁,554300

罗汉果 黄腐酸钾 光合特性 叶绿素荧光 单果干质量 罗汉果甜苷V

2024

中国南方果树
中国农业科学院柑桔研究所

中国南方果树

CSTPCD北大核心
影响因子:0.527
ISSN:1007-1431
年,卷(期):2024.53(6)