Field plot experiment was carried out to definite the effects of raising chicken on weed control and corn yield in organic corn field.Two treatments were designed as raising chicken treatment and no raising chicken treatment (CK) for 30 days at the male tetrad stage of corn,and there was no weed control after the male tetrad stage.The results showed that the yield of corn in CK treatment with no weed control was only 4 945 kg/hm2,while in the raising chicken treatment at the male tetrad stage of corn,the yield significantly increased by 31.0％ (P ＜ 0.05).After raising chicken for 20 days,the average height of weeds decreased by 25.7％,and the weed species (4 species),average total density (17 plants/m2),coverage (11.3％) and biomass (29.8 g/m2) were significantly lower than the weed species (10 species),average total density (86.3 plants/m2),coverage(76.7％) and biomass (170.1 g/m2) in CK treatment,which decreased the Shannon-Wiener index,Pielou index and Margalef index.However,after moving the chicken away from the field,the weed diversity indexes restored.Therefore,raising a certain amount of chicken in the organic corn field could effectively control the weeds,and it would not damage the ecological balance and biodiversity of the ecological agriculture system and could guarantee the production and safety of corn.%为寻求有机玉米田杂草防治技术,明确放养鸡对玉米田杂草控制和产量的影响,采用大田小区试验,设玉米大口期放养鸡30天处理和不放鸡对照,大口期后不再除草.结果显示:玉米大口期后不防治杂草,玉米产量仅有4 945 kg/hm2,而在大口期放养鸡,产量增加31.0％(P＜0.05);放养鸡20天后杂草平均高度降低25.7％,杂草种类(4种)、平均总密度(17株/m2)、盖度(11.3％)和生物量(29.8g/m2)均显著低于未放鸡玉米田杂草种类(10种)、平均总密度(86.3株/m2)、盖度(76.7％)和生物量(170.1 g/m2) (P＜0.05),进而使得Shannon-Wiener多样性指数、Pielou均匀度指数和Margalef物种丰富度指数降低,但将鸡收回后杂草多样性指数又得到恢复.因此,放养一定量的鸡可有效控制田间杂草,同时不会破坏农田生态系统的生态平衡及生物多样性,并能保障粮食产量和安全.
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