不同除草方式对浙西南柑橘园杂草群落及其多样性的影响

于2005年6月—2008年5月在浙江衢州市柑橘主产区,运用群落生态学方法研究了化学除草、人工除草和化学除草+人工除草3种方式对果园杂草群落及其多样性的影响.结果表明:化学除草试验区杂草为17科46种,人工除草试验区杂草为20科59种,化学除草+人工除草试验区杂草为18科51种,对照区杂草为25科75种.化学除草处理的杂草物种丰富度指数、Shannon多样性指数和Shannon均匀度指数最低,人工除草处理最高,表明化学除草对果园杂草多样性的影响最大.在浙西南柑橘园既要防除杂草,又要维持果园杂草的多样性,建议采取化学除草+人工除草的方式.

Effects of weeding methods on weed community and its diversity in a citrus orchard in southwest Zhejiang

By using the research methods of ecological community, the effects of
different weed management strategies including chemical weeding, manual weeding,
 and their combination on the weed community and its diversity in a citrus chard
 of main orange producing region in Quzhou City, Zhejiang Province were studied
from June 2005 to May 2008. In control plots, there were 75 species and 25 famili
es of weeds; after chemical weeding, manual weeding, and their combination, ther
e were 46 species and 17 families, 59 species and 20 families, and 51 species an
d 18 families of weeds, respectively. The Margalef’s species richness index, Sh
annon’s diversity index, and Shannon’s evenness index were the lowest after c
hemical weeding, but the highest after manual weeding, suggesting that chemical w
eeding had the greatest effects on the weed diversity in the citrus orchard. It
was suggested that to sufficiently control the weeds while to maintain the weed
diversity in the orchard weeds in southwest Zhejiang, the combination of chemica
l and manual weeding would be the best management strategy.