continuous cropping

• 连作

continuous cropping的用法和样例：

例句

1. The allelopathic effect of continuous cropping soil of Panax notoginseng was investigated and its mechanism was revealed initially.
   摘要探讨三七连作土壤的化感作用，初步揭示三七连作土壤化感作用的机制。
2. Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.
   摘要利用平板培养法对黄瓜连作根系微生物种群连续性变化进行了跟踪研究。