Abstract: 【Objective】To investigate the effects of combined application of organic fertilizer and corn straw on the growth,yield,and quality of continuous cropping pepper in tunnel in the mountainous region of Southern Ningxia.【Methods】The effects of several treatments（with no organic fertilizer as control）on the growth indexes,quality traits,and yield of pepper during flowering,fruiting,and harvest stages were studied using a randomized block design.【Results】Plant height and stem diameter of pepper in treatment 6（base fertilizer supplemented with decomposed chicken manure 22 488.8 kg/hm²+corn straw 29 985.0 kg/hm²）were higher than all the other treatments in all three growth stages of pepper. Treatment 1（base fertilizer supplemented with 59 970.0 kg/hm² of rotten sheep manure）and treatment 3（base fertilizer supplemented with 22 488.8 kg/hm² of rotten chicken manure）had significantly higher net photosynthetic rates than the other treatments（P<0.05）. Treatment 1 and treatment 5（base fertilizer supplemented with rotten cow manure 74 962.5 kg/hm²+corn straw 29 985.0 kg/hm²）had significantly more fruit per plant than treatment 4（base fertilizer supplement with rotten sheep manure 59 970.0 kg/hm²+corn straw 29 985.0 kg/hm²）and the control（P<0.05）. Treatment 1,treatment 3,and treatment 6 had significantly higher single fruit weights than the other treatments（P<0.05）. Treatment 6 had the highest yield and economic value,with 101 503.5 kg/hm² and 111 654.0 yuan/hm² respectively,higher than that of treatment 1,treatment 2（base fertilizer supplemented with 74 962.5 kg/hm² of rotten cow dung）,treatment 3,treatment 4,treatment 5,and the control by 5.56%,19.00%,2.15%,4.35%,14.12%,and 26.75%. Treatment 1 had the highest VC（105.00 mg/g）and soluble sugar conten（11.20 mg/g）,followed by treatment 6,at 101.00 and 10.59 mg/g,respectively. Treatment 5 had the highest soluble protein content at 1.49 mg/g.【Conclusion】 Continuous cropping obstacle of pepper in tunnel could be mitigated by using base organic fertilizers. The use of base fertilizer supplemented with 22 488.8 kg/hm² rotting chicken manure and 29 985.0 kg/hm² corn straw significantly improved the growth index,yield,and quality of pepper,suitable for the Southern Ningxia′s mountainous region.

Key words: Organic fertilizer, Corn straw, Tunnel continuous cropping, Pepper, Growth, Yield, Quality