不同LED补光处理下蓝莓光合与养分重吸收的特征及其对花芽质量的影响OA
The Characteristics of Photosynthesis and Nutrient Resorption of Blueberry under Different LED Supplementary Light Treatments and Their Effects on Flower Bud Quality
为解决设施栽培条件下延季蓝莓因秋季光照不足而导致的花芽生长不佳的问题,以4年生'自由'蓝莓容器苗为材料,利用LED灯作为光源,设置不同光强、光质(红蓝光质比)、光周期的三因素三水平正交试验,以温室自然光为对照,通过测定叶片叶绿素质量分数、气体交换参数、不同时期氮(N)、磷(P)的养分重吸收效率,以及花芽的质量和形态指标(横径与长度)来研究不同补光条件下蓝莓光合和养分重吸收的特征及其与花芽质量的关系.结果表明,补光3周后,不同光照处理下蓝莓光合能力存在差异,在补光条件为,低光强(300 μmol/(m2·s)),中、低红蓝光质比(1∶1、1∶3),中、短光周期(7.5、6 h),此时蓝莓的净光合速率最高.停止补光2周后,不同光照处理下的蓝莓养分重吸收效率存在差异,在中光强(450 μmol/(m2·s))、高红蓝光质比(3∶1)、短光周期(6 h)的补光条件下,N、P的养分重吸收效率最高.在补光条件为,高光强(600 μmol/(m2·s)),中、高红蓝光质比(1∶1或3∶1),中、短光周期(7.5、6 h),或者中光强(450 μmol/(m2·s)),高红蓝光质比(3∶1),短光周期(6 h),其花芽质量较好.不同补光处理可以通过调节延季蓝莓的光合和N、P养分重吸收效率来影响花芽的质量,养分重吸收效率对花芽质量的影响大于净光合速率,且N的养分重吸收效率对花芽质量的影响大于P养分重吸收效率.综合光合和养分重吸收对花芽质量的影响得出,中光强(450 μmol/(m2·s))、低红蓝光质比(1∶3)、短光周期(6 h)的补光条件下,最有利于提高延季蓝莓的花芽质量.
In order to solve the problem of poor flower bud growth caused by insufficient light in autumn under facility cultivation conditions,four-year-old blueberry'Liberty'container seedlings were used as materials,and LED lights were used as light sources.Setting different light intensity,light quality(red and blue light ratio)and photoperiod,a three-factor and three-level orthogonal test,and greenhouse natural light was used as a control.The chlorophyll content,gas exchange parameters,and nutrient resorption efficiency of nitrogen(N)and phosphorus(P)in different periods were measured.The weight and morphological indexes(transverse diameter and length)of flower buds were used to study the characteristics of photosynthesis and nutrient resorption of blueberry under different light conditions and their relationship with flower bud quality.The results showed that the photosynthetic capacity of blueberry was different under different light treatments after three weeks of supplementary light.The net photosynthetic rate of blueberry was the high-est under low light intensity(300 μmol/(m2·s)),medium or low red and blue light quality ratio(1∶1 or 1∶3),me-dium or short photoperiod(7.5 h or 6 h).The nutrient resorption efficiency of blueberry under different light treatments was different after two weeks of stopping light supplementation.Under the light conditions of medium light intensity(450 μmol/(m2·s)),high red and blue light ratio(3∶1)and short photoperiod(6 h),the nutrient resorption efficiency of nitrogen(N)and phosphorus(P)was the highest.The quality of flower buds was better under the conditions of high light intensity(600 μmol/(m2·s)),medium or low red and blue ratio(1∶1 or 1∶3),medium or short photoperiod(7.5 h or 6 h)or medium light intensity(450 μmol/(m2·s)),high red and blue ratio(3∶1)and short photoperiod(6 h).Different light treatments can affect the quality of flower buds by regulating the photosynthesis and the nutrient re-sorption efficiency of N and P in late-season blueberries.The effect of nutrient resorption efficiency on flower bud quality was greater than that of net photosynthetic rate,and the effect of N nutrient resorption efficiency on flower bud quality was greater than that of P nutrient resorption efficiency.Based on the effects of photosynthesis and nutrient resorption on flower bud quality,it was concluded that medium light intensity(450 μmol/(m2·s)),low red and blue light ratio(1∶3),and short photoperiod(6 h)were most beneficial to improve the flower bud quality of blueberries.
李晶波;张亦鹏;刘名昱;周丽萍;何丹娆;张鹏
东北林业大学 林学院,森林生态系统可持续经营教育部重点实验室,哈尔滨 150040东北林业大学 林学院,森林生态系统可持续经营教育部重点实验室,哈尔滨 150040东北林业大学 林学院,森林生态系统可持续经营教育部重点实验室,哈尔滨 150040黑龙江省科学院自然与生态研究所,哈尔滨 150040黑龙江省科学院自然与生态研究所,哈尔滨 150040东北林业大学 林学院,森林生态系统可持续经营教育部重点实验室,哈尔滨 150040
农业科技
蓝莓光照光合养分重吸收花芽
Blueberrylightphotosynthesisnutrient resorptionflower bud
《森林工程》 2026 (1)
44-54,11
黑龙江省学科协同创新项目.
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