西玛津是一种内吸性传导型高效低毒除草剂,能除灭大部分杂草,除草效果达90％以上,残效期又较长,是柑园除草一种较好的药剂。但是,据介绍在北方喷施一次西玛津的地,二年之内种植豆类、萝卜等作物会产生较严重的药害。为了探讨在南方柑园除草后,第二年西玛津残毒对间种绿肥的影响,我们于1977年春季在西玛津除草的地段进行间种豆科绿肥的试验。 Simazine is a kind of high efficiency and low toxicity herbicide that absorbs most of the weeds, has a herbicidal effect of more than 90% and a long residual period, which is a good pesticide for citrus orchard weeds. However, it is reported that once Simazine was sprayed in the north, the cultivation of beans and radish crops within two years would produce more serious injury. In order to investigate the effect of simazine residues on intercropping green manure in the second year after weeding in southern citrus orchards, we conducted interspecific legume green manure testing in the weeds in Simazin in the spring of 1977.