不同连作年限对打瓜农艺经济性状的影响

摘要

为了研究重茬连作对打瓜植株性状、产量和品质的影响,选择在农十师183团连作1、2、3、4和5年的田块为5个连作处理,以连作1年为对照,随机区组设计,3次重复,对打瓜主蔓长、主茎节数、子蔓数等农艺性状进行分析.结果表明:随着连作年限的延长,打瓜农艺经济性状有不同程度的降低趋势.打瓜连作年限与打瓜主蔓长及打瓜节数呈极显著的负相关关系；连作年限与打瓜子蔓数也呈负相关,连作前3年对打瓜子蔓数的影响较为显著；同样随着打瓜连作年限的延长,打瓜瓜数总体仍呈递减趋势,减少幅度较为平缓,仅在连作3年后递减达到最高峰,其它连作年限之间减少相差不大；而连作年限对于打瓜坐瓜节位没有显著影响.%In order to study the effect of continuous cropping on agronomic traits,yield and quality,the watermelon was planted in the fields where were continuously planted watermelon for 1,2,3,4 and 5 years,respectively, to determine the main vine length,the number of the main stem joint and the number of the secdonary vine. The results showed that,with the delay of continuous planting time ,the agronomic traits had decreasing tendency with the different degree. The continuous planting time had obvious negative correlation with the main vine length and the number of the main stem joint. The continuous planting time had negative correlation with the the number of the secdonary vine. With the delay of continuous planting time,the number of watermelons had decreasing tendency,but the decreasing amplitude was stable. However,the continuous planting time had no obvious effect on the sitting fruit joint.