Optimization Of Main Cultivation Factors And Research Of Photosynthetic Indexes In Purple Pepper

Based on early yield and economic benefits,the best one of purple pepper FL-2×1111 PYTZR-1-2-2 was selected from 19 hybridization combinations,and as subsequently tested material.The effects of five main cultivation factors,such as density,planting time,boron fertilizer,soybean meal fertilizer and nitrogen fertilizer on the yield,quality and photosynthetic indexes of the purple pepper were studied,and the appropriate ranges of 5 cultivation factors were optimized.The results showed that:1.The plant height,development degree,number of fruits,fruit weight,fruit length and fruit width of the 19 pepper combinations all reached significant difference levels,of which 12 purple fruit types,combination 1(FL-2x1111 PYTZR-1)-2-2)the maximum yield in the early period reached 2313.71 kg/667m~2,and the highest economic benefits is 4626 yuan/667m~2.2.Different factors had significant effects on the yield of purple pepper FL-2×1111PYTZR-1-2-2.When the level of each factor is:density of 3800 plants/667m~2,colonization period of April 20,boron fertilizer of 3.0 kg/667m~2,organic cake fertilizer of 120.0 kg/667m~2,and nitrogen fertilizer of 50.0 kg/667m~2,the maximum yield of pepper fruits is 2685.82 kg/667m~2.At the same time,the optimum interval for the yield above 2000 kg/667 m~2 is:density 3894～3991/667m~2,colonization period April 9～April 12,boron fertilizer 1.866～2.150 kg/667m~2,organic cake fertilizer 123.456～128.445 kg/667m~2,nitrogen fertilizer 42.009～44.933kg/667m~2.3.Different cultivation factors had significant effects on soluble sugar,protein,vitamin C,anthocyanin and soluble solids content and dry weight of single fruit of purple pepper FL-2×1111PYTZR-1-2-2.When the density is 3800 plants/667m~2,the colonization period is April 20,the boron fertilizer is 3.0 kg/667m~2,the organic cake fertilizer is 120.0 kg/667m~2,and the nitrogen fertilizer is 50.0 kg/667m~2,the highest comprehensive score of the pepper fruit quality is 95.82.At the same time,the optimal interval for each treatment level with a good(80)or better quality score is:density of 3484 to 3579 strains/667m~2,and period of colonization plantting from April 10 to April 11;boron fertilizer is 1.945 to 2.040 kg/667m~2,organic cake fertilizer 103.894～108.368 kg/667m~2,nitrogen fertilizer 39.894～40.836 kg/667m~2.4.Different cultivation factors had significant effects on the main photosynthetic indexes such as relative chlorophyll content(SPAD value)and net photosynthetic rate(Pn)of purple pepper FL-2×1111PYTZR-1-2-2.When the treatment levels were:density of 3800 plants/667m~2,colonization period of April 20,boron fertilizer 3.0 kg/667m~2,organic cake fertilizer 120.0 kg/667m~2,nitrogen fertilizer 50.0 kg/667m~2,the maximum SPAD value and the highest Pn are 64.10 and 28.60 μmo·lm~2·s-1,respectively.Through the analysis of the correlation between leaf SPAD,Pn and yield and quality under different cultivation factors,the main photosynthetic indicators were significantly positively correlated with yield and quality.