Abstract: Abstract：Using the processed pepper variety‘Yanjiao 425’as the test material，culturing in a greenhouse，the effects of different application amounts（0.3、0.6、0.9、1.2、1.5 t · hm-2）of calcium cyanamide（CaCN2）on rhizosphere soil environment and plant growth with continuous planting of Capsicum annuum L. were studied．The results showed that under the treatment of T4（1.2 t · hm-2）and T5（1.5 t · hm-2），the soil physical properties（such as soil porosity，saturated water content，field water holding capacity，saturated hydraulic conductivity），the soil nutrient contents（such as available nitrogen，available phosphorus，available potassium and organic matter）were signifi cantly higher than those of CK．These treatments maintained high soil urease activity and soil bulk weight was signifi cantly lower than CK．In the peak fruiting period of pepper，there was no signifi cant diff erence in plant height，spreading degree， fruit setting number of single plant，fruit length and plot yield of pepper under diff erent application amounts，but they were significantly higher than CK．With the increasing dose of CaCN2，the pepper diseases were effectively controlled，and the incidence rates were only 8.6%（T4）and 5.5 %（T5）．In summary，the applications of CaCN2 at 1.2 t · hm-2 and 1.5 t · hm-2 could eff ectively reduce the incidence rates of continuous cropping pepper，significantly improving the rhizosphere soil environment，and promote its growth and development．Considering the application eff ect and production cost，CaCN2 application amount of 1.2 t · hm-2 was recommended for mitigating the obstacle of continuous cropping pepper．

Key words: Keywords：calcium cyanamide（CaCN2）, Capsicum annuum L., continuous planting, soil

摘要： 摘　要：以加工型辣椒品种艳椒425 为试材，采用大棚栽培方式，研究了氰氨化钙（CaCN2）不同施用量（0.3、0.6、0.9、1.2、1.5t · hm-2）对连作辣椒根际土壤环境及植株生长发育的影响。结果表明：CaCN2 施用量为1.2 t · hm-2 和1.5 t · hm-2 时，连作辣椒根际的土壤孔隙度、饱和含水量、田间持水量、饱和导水率等土壤物理性质及碱解氮、有效磷、速效钾和有机质等土壤养 分含量均显著高于不施用CaCN2 的CK，且保持了较高的土壤脲酶活性，土壤容重则比CK 显著降低；辣椒结果盛期辣椒株高、开展度、单株结果数、果长及小区产量等两处理差异不显著，但均显著高于CK。随着CaCN2 施用量的增加，辣椒病害得到有效控制，CaCN2 施用量为1.2 t · hm-2 和1.5 t · hm-2 时，病株率分别仅为8.6% 和5.5%，显著低于CK 和其他处理。综上，CaCN2 施用量为1.2 t · hm-2 和1.5 t · hm-2 能有效降低连作辣椒的病株率，显著改善根际土壤环境，并对辣椒生长发育有良好的促进作用。综合考虑应用效果及生产成本，推荐CaCN2 施用量1.2 t · hm-2 用于缓解辣椒连作障碍。

关键词: 关键词：氰氨化钙（CaCN2）, 辣椒, 连作, 土壤