摘要
水稻株型结构能够影响水稻的产量和品质。稻鸭共作能否对水稻株型结构产生影响,目前这方面的定量研究还很少。本研究通过田间对比试验,探讨了稻鸭共作与常规稻作两种处理对水稻分蘖期和齐穗期的部分株型结构指标的影响。结果表明,与常规稻作方式相比,稻鸭共作使水稻基部宽度呈减小趋势、冠层幅度呈增大趋势,最终使植株松散度显著增加,分蘖期和齐穗期增幅分别为12.2%和42.3%。稻鸭共作使水稻倒3叶和倒4叶的叶长、叶开角和披垂度减少,使剑叶和倒2叶的叶长、叶开角和披垂度增大,从而使水稻呈上披下挺的株型结构,并使叶面积主要分布于上部叶片。稻鸭共作使水稻植株的基叶高呈增加趋势,在齐穗期与常规处理达到显著性差异。稻鸭共作有利于水稻生育前期和中期的茎蘖合理发展,而且在后期可促进水稻上部功能叶片的生长,这在一定程度上有利于水稻高产的形成。
Although rice canopy structure is a critical factor that influences rice yield and quality, few research has been conducted on the effects of rice-duck farming on rice canopy structure. In a field experiment therefore, canopy structure characteristics at tillering and full-heading stages of late rice were compared between rice-duck farming and conventional rice farming （control） treatments. The results showed that rice-duck farming increased rice canopy width but decreased basal width. Furthermore, the leaf loose rate of rice-duck farming increased by 12.2% and 42.3% at tillering and full-heading stages, respectively, compared with the control. Rice-duck farming lowered leaf length, opening angel and drooping degree of the fourth and third leaves. The opposite effects were, however, noted for the second and flag leaves. This made the upper leaves flatter and the lower leaves more erect than the control treatment. This in turn enhanced leaf area distributed in upper canopy horizon. Rice-duck farming increased rice basal leaf height. Compared with the control, this resulted in significant differences at full-heading stage. The findings of the study indicated that rice-duck farming had positive effects on rice stem and tiller development in the early and middle growth stages. It improved growth of upper functional leaves which was beneficial to rice yield formation at late growth stage.
出处
《中国生态农业学报》
CAS
CSCD
北大核心
2012年第1期1-6,共6页
Chinese Journal of Eco-Agriculture
基金
国家重大基础研究发展计划(973计划)项目(2006CB100206
2011CB100406)
国家自然科学基金项目(30800134
30770403)
国家环保部公益性行业科研专项(201009020-04)
广东省科技计划项目(2004B20101017
2009B020311012)
广东省现代农业产业技术体系建设专项项目(粤农[2009]380号)资助
关键词
稻鸭共作
株型结构
叶开角
松散度
叶面积指数
披垂度
Rice-duck farming, Plant canopy structure, Opening angel, Loose rate, Leaf area index, Drooping degree
