| 刘探1彭海峰2覃凤玲1崔玉梅2谭碧凌1陈雄辉1.化感稻新品系抑制稗草能力的田间表现[J].广东农业科学,2014,41(6):19-23 |
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化感稻新品系抑制稗草能力的田间表现 |
| Inhibitory effect of new allelopathic rice strainson barnyard grass in the filed |
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| DOI： |
| 中文关键词: 水稻,稗草,抑草特性,化感作用,竞争作用 |
| 英文关键词: rice barnyard grass inhibitory effect allelopathy effect competition effect |
| 基金项目:广东省科技计划项目 2011A020102008,广东省
教育部产学研结合项目渊2012B091100426) |
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| 中文摘要: |
| 为了比较22 个化感稻新品系和美国强化感稻PI312777 抑制稗草的能力,采用田间小区试验,对水稻封
行前抑草率.竞争抑草率\灌浆期抑草率\伴生稗草平均株高和稗草单株干物重进行调查分析.结果显示院化感稻的
抑草作用受环境条件影响,其中化感作用表现相对稳定,竞争作用随环境变化较大曰化感稻的抑草作用主要表现在
抑制稗草萌发和资源竞争力弱的稗草死亡,封行前抑草率是影响其抑草效果的主要因素.基于灌浆期抑草率,初步
筛选到12 份抑草特性强且田间表现相对稳定的化感稻新品系3\4\6\7\12\14\15\16\17\19\21\22,其中化感稻新
品系15\16 在2011 年晚季和2012 年早季均表现出较强的抑草特性袁化感稻新品系6尧15尧19 在2011 晚季的抑草特
性优于美国强化感稻PI312777,这些强化感稻新品系的筛选将有助于化感稻商业品种的选育及生产应用. |
| 英文摘要: |
| Inhibitory effect of 22 new allelopathic rice strains on barnyard grass 也Echinochloa crusgalli (L.) Beauv 页
was compared with PI312777, a strong allelopathic rice of the United States as control, by using field plot experiment. The
inhibition rate before sealing line, inhibition rate of competition and inhibition rate of filling stage of allelopathic rices, and
the average plant height and the dry weight per plant of associated barnyard grass were investigated in this paper. The
results showed that the inhibitory effect of allelopathic rice on barnyard grass was influenced by environmental conditions,
and the allelopathy effect was relatively stable, while the competition effect varied greatly with the environment. The
allelopathic rices mainly inhibited weed germination and made weak resource competitive weed to death. The inhibitory
rate before sealing line was the main factor affecting the total inhibitory effect of allelopathic rices on barnyard grass. Based
on the inhibitory rate of filling stage, we preliminarily screened 12 new allelopathic rice strains with strong and relatively
stable inhibitory effect on barnyard grass in the field, they were allelopathic rice strains 3, 4, 6, 7, 12, 14, 15, 16, 17, 19,
21 and 22, in which strains 15 and 16 showed strong inhibitory effect on barnyard grass in late season of 2011 and early
season of 2012 and strains 6, 15, and 19 showed stronger inhibitory effect on barnyard grass than PI312777 in late season
of 2011. The screening of these new allelopathic rice strains will help the breeding and production application of
commercial allelopathic rice. |
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