Samples were taken where irrigation

Samples were taken where irrigation water entered (considered
clean and pesticide free) and exited both treatments. Macroinvertebrates
were collected from July 2003 to August 2004, using
the artificial substrate method (Castillo, 2000). Each substrate
consisted of a concrete block (20 cm × 12 cm × 6 cm) inside a nylon
mesh bag (Trama et al., 2008), which was placed under the water
for colonization by macroinvertebrates for 1 month. Two blocks
were placed in the irrigation channel (entrance into the field) and
two more blocks were placed into the drainage channel(water exit)
on each treatment (organic or conventional). Each bock was considered
as a an individual sampling unit and the total sampling
effort consisted of four blocks sampled every month for 1 year
(2003–2004) on each cultivation site (48), for a total of 96 blocks
sampled for the study.
In order to collect macroinvertebrates, the blocks and mesh
were scrubbed with brush and water over a 500 m sieve. The
passed content was placed into 90% Ethanol until identified.
Macroinvertebrates were separated in multi-plates by morpho
types, and then classified by species if possible, or by genus or

Results (English) 3:

样品在灌溉水进入（考虑
干净无农药）和退出处理。无脊椎动物是从2003七月至八月
2004收集，利用人工基质
方法（卡斯蒂略，2000）。每个基板
由混凝土块（20厘米12厘米6厘米××）在尼龙
网袋（髓等人。，2008），这是放置水下
定植的底栖动物1个月。两块
被放置在灌溉渠道（入场）和
两个街区被放置到排水沟（出水）
每个处理（有机或常规）。每一个博克是
作为一个个体采样单元和总采样
努力由四块采样每月1年
（2003，2004在每个培养–）网站（48），总共96块

采样的研究。为了收集无脊椎动物，块和网格
原本超过500米筛刷和水。
通过的内容放入90%乙醇中直到确定。
无脊椎动物多板形态
类型分开，然后按物种如果可能的话，或属或