MA Cunjin,CHEN Jianqiu,LI Yuepeng,et al.Effects of the Addition of Magnesium on Photosynthetic Characteristics, Dry Matter Accumulation and Distribution of Pepper[J].Northern Horticulture,2018,42(10):9-14.[doi:10.11937/bfyy.20174668]
水溶肥中镁不同添加量对辣椒光合特性、干物质积累与分配的影响
- Title:
- Effects of the Addition of Magnesium on Photosynthetic Characteristics, Dry Matter Accumulation and Distribution of Pepper
- Keywords:
- pepper; magnesium; photosynthetic characteristics; dry matter; accumulation and distribution
- 文献标志码:
- A
- 摘要:
- 以线椒“8819”为试验材料，采用盆栽的方法，研究镁元素在水溶肥中不同添加量（0、0.25%、0.50%、1.00%、2.00%、4.00%，均以MgO计）对辣椒光合特性、干物质积累与分配的影响。结果表明：在低添加量下（0～2.00%时），添加镁元素提高了辣椒的光合性能，改变了辣椒干物质的积累与分配规律，随着镁元素添加量增加，辣椒各光合指标（单株叶面积、SPAD、净光合速率）、干物质积累量均呈先升后降的趋势，于1.00%处理达到最大，叶片干物质分配比例、转运量、转运率和贡献率均明显提高，而茎秆和根系的转运率和贡献率下降；当添加量达4.00%时，光合各指标和干物质积累量低于对照，辣椒茎秆干物质分配比例提高，转运量、转运率和贡献率无明显提高，而叶片转运量、转运率和贡献率均下降，说明镁元素高添加量对辣椒叶片光合有抑制作用，〖JP+2〗不利于辣椒进行光合作用，且改变了植株干物质的分配与转运，不利于干物质从营养器官向生殖器官中转化。综上，在〖JP〗0～2.00%范围内，镁元素添加提高了辣椒的光合性能，优化了辣椒干物质的积累与分配，其中以1.00%处理效果最好，4.00%对辣椒的光合性能产生抑制作用，不利于辣椒干物质积累与分配，进而影响产量提高。
- Abstract:
- Using the method of the potted pepper,the effects of the addition of magnesium on photosynthetic characteristics,dry matter accumulation and distribution of pepper were studied.Pepper ‘XJ8819’ were used and six magnesium levels,0,0.25%,0.50%,1.00%,2.00%,and 4.00%,were designed to measure each index.The results showed that the addition of magnesium improved the photosynthetic performance,and changed the rules of dry matter accumulation and distribution of pepper at low levels.With the increase of the concentration of the addition of magnesium,all the tested photosynthetic terms,leaf area per plant,SPAD,photosynthetic rate,dry matter accumulation amount showed a trend of rising firstly and decreased then.Among them,the treatment which the concentration of 1.00% was the best.Dry matter distribution rate,translocation amount,translocation rate,contribution rate of leaves were improved obviously,but the translocation rate and contribution rate of stems decreased.Photosynthetic terms and dry matter accumulation amount were lower than CK when the treatment concentration achieved 4.00%.Dry matter distribution rate,translocation amount,translocation rate,contribution rate of stems had no significant increase,but translocation amount,translocation rate,contribution rate of leaves decreased.This results showed that a high concentration of the addition of magnesium had a inhibiting effect on the photosynthesis of pepper.At the same time,this changed the dry matter distribution and translocation of pepper,making against the transformation from a vegetative organ to a reproductive organ of dry matter.In summary,the addition of magnesium promoted the photosynthetic performance and the rules of dry matter accumulation and distribution of pepper were optimized at low levels which were the best at the concentration of 1.00%,but had an inhibiting effect on the photosynthetic performance of pepper when the treatment concentration achieved 4.00%.As a result,the dry matter accumulation and distribution,the yield of pepper were unimpaired by the high addition of magnesium.
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备注/Memo
第一作者简介：马存金（1989-），男，硕士，助理农艺师，现主要从事作物栽培生理及新型肥料等研究工作。E-mail:macunjin@kingenta.com.责任作者：任士伟（1984-），男，硕士，农艺师，现主要从事植物营养和新型肥料等研究工作。E-mail：renshiwei@kingenta.com.基金项目：国家重点研发计划资助项目（2016YFD0222405-7）；〖JP〗山东省重点研发计划资助项目（2016ZDJQ0701）。收稿日期：2018-02-01