不同配置与密度对朝天椒干物质积累及产量的影响OA

Taking'Yanjiao 618'and'Baoyin 839'as the test materials,two rows configuration patterns(equal row spacing two rows,66 cm+66 cm;equal row spacing three rows,44 cm+44 cm+44 cm)and three plant spacings levels(25,30,35 cm)were set,forming a total of six planting patterns.The dynamic of dry matter accumulation after anthesis was measured.The Logistic equation was used to fit the process and analyze the parameters such as maximum accumulation rate(Vm)and rapid accumulation duration(T).The dry matter distribution ratio and final yield composition at maturity stage were determined,in order to optimize the population structure of drip-irrigated chili peppers in Xinjiang and provide a reference for high-yield and efficient cultivation.The results showed that the total dry matter accumulation,Vm and T value of single plant under equal row spacing with two rows were better than those under wide-narrow row spacing with three rows.Among them,the comprehensive performance of equal row spacing with two rows and 35 cm plant spacing was the best.Under this mode,the total dry matter accumulation per plant of'Yanjiao 618'was the highest,and the fresh weight of single fruit of'Baoyin 839'was the largest.Logistic model analysis showed thatthe mode of equal row spacing with two rows and 35 cm plant spacing provided the highest Vm(10.71 g·d-1)for'Baoyin 839',showing a'high-speed accumulation'strategy;it provided a longer T for'Yanjiao 618',showing a'persistent accumulation'strategy.The dry matter distribution shifted from vegetative organs to flowers and fruits with the growth process,and the proportion of flowers and fruits reached 50％-57％at the mature stage,and the reproductive allocation tendency of plants under wide-narrow row spacing with three rows was more significant.The yield per unit area was the highest in wide-narrow row spacing with three rows and 25 cm plant spacing treatment,but its single plant traits were inhibited.In conclusion,equal row spacing with two rows and moderate low density(35 cm plant spacing)can optimize the canopy structure,significantly improve the dry matter accumulation ability and efficiency of single plant,and was a recommended model for cultivating high-yield and high-quality individuals.The physiological response strategies of varieties to the optimized mode were different,and the corresponding mode could be matched according to the characteristics of varieties(multi fruit type or large fruit type)in production.