论文部分内容阅读
通过人工设置不同类型杂草自然生长区,研究不同类型杂草对小麦产量的影响。试验结果表明,在以日本看麦娘(Alopecurus japonicus)和菵草(Beckmannia syzigachne)为优势种群的禾本科杂草自然生长区、以牛繁缕(Malachiumaquaticum)和小藜(Chenopodium serotinum)为优势种群的阔叶类杂草自然生长区、以日本看麦娘+菵草+牛繁缕为优势种群的混合杂草自然生长区和无草区中,以无草区实测产量最高,为407 kg/667m2,禾本科杂草生长区小麦实测产量为329.8 kg/667m2,阔叶杂草生长区小麦实测产量为302.5 kg/667m2,混合杂草生长区小麦实测产量为280.9 kg/667m2。对比无草区,禾本科杂草生长区、阔叶杂草生长区和混合杂草生长区的产量损失率分别为18.94%、25.60%和31.00%。方差分析结果显示,禾本科杂草自然生长区、阔叶类杂草自然生长区和混合杂草自然生长区小麦产量损失率差异显著(p<0.05),按损失率高低排列为混合杂草自然生长区>阔叶杂草自然生长区>禾本科杂草自然生长区。
The effects of different types of weeds on wheat yield were studied by manually setting different types of weeds in natural areas. The results showed that Malachiumaquaticum and Chenopodium serotinum were the dominant species in the gramineous weed growing area dominated by Alopecurus japonicus and Beckmannia syzigachne in Japan. Of the broad-leaved weeds in the natural growth areas to Japan to see the Amanita + Ephedra + Niu Fan rayon as the dominant populations of mixed weeds in the natural growth and grass-free areas, grass-free zone to measure the highest yield of 407 kg / The measured yield of wheat in the weed growing area was 329.8 kg / 667 m2, that of the broadleaf weed growing area was 302.5 kg / 667 m2, and that of the mixed weed growing area was 280.9 kg / 667 m2. The yield loss rates in comparison with no grassland, grassy weed growing area, broadleaf weed growing area and mixed weed growing area were respectively 18.94%, 25.60% and 31.00%. Analysis of variance showed that there was significant difference (p <0.05) in wheat yield loss in the natural growth areas of weeds, natural broad-leaved weeds and natural growth areas of mixed weeds, which were ranked as mixed weeds according to the loss rate Growing Area> Broadleaf Weed Growing Area> Grass Weed Growing Area.