摘要
通过长期田间定位试验,研究了水旱轮作条件下不同复种方式对稻田杂草群落组成及物种多样性的影响.结果表明:复种轮作可显著降低稻田杂草密度,抑制杂草生长.不同复种轮作方式下,紫云英-早稻-晚玉米→紫云英-早玉米间作早大豆-晚稻(CCSR)处理物种优势度最低,能降低优势种杂草地位,减轻危害.不同复种轮作方式下基本杂草群落组成均为鸭舌草+稗草+矮慈姑,杂草群落的相似性均较高,其中紫云英-早稻-晚玉米间作晚大豆→紫云英-早玉米-晚稻(CRCS)处理与CCSR处理的相似度最高.稻田复种轮作可在一定程度上提高对杂草的抑制效果,但需要注意某些次要杂草的危害.
Based on a long term field experiment, this paper studied the effects of different multiple cropping systems on the weed community composition and species diversity under paddy-upland ro- tation. The multiple cropping rotation systems could significantly decrease weed density and inhibi- ted weed growth. Among the rotation systems, the milk vetch-early rice-late maize → milk vetch- early maize intercropped with early soybean-late rice （CCSR） had the lowest weed species domi- nance, which inhibited the dominant weeds and decreased their damage. Under different multiple cropping systems, the main weed community was all composed of Monochoia vaginalis, Echinochloa crusgalli, and Sagittaria pygmae, and the similarity of weed community was higher, with the high- est similarity appeared in milk vetch-early rice-late maize intercropped with late soybean → milk vetch-early maize-late rice （CSCR） and in CCSR. In sum, the multiple cropping rotations in paddy field could inhibit weeds to a certain extent, but attentions should be paid to the damage of some less important weeds.
出处
《应用生态学报》
CAS
CSCD
北大核心
2013年第9期2533-2538,共6页
Chinese Journal of Applied Ecology
基金
国家科技支撑计划项目(2012BAD14B14-01
2007BAD89B18-03)资助
关键词
水旱轮作
复种方式
稻田
杂草群落
paddy-upland rotation
multiple cropping system
paddy field
weed community.
