| 摘要: |
| 在田间严格控制土壤灌溉条件下,以常规水田为对照,研究了覆盖旱种(地膜、稻草和裸地)对水稻农学性状及产量变化的影响。结果表明,覆盖旱种水稻分蘖早,分蘖多,其中覆膜的效果优于覆草。增加每穴基本苗,可以提高成穗率,降低秕谷率。覆盖旱种的3个处理叶面积指数依次为覆膜>覆草>裸地。虽然覆盖旱种水稻的籽粒产量略低于或显著低于常规水田,但是覆盖旱种处理的生物量与常规水田在统计学上没有显著差异,而且覆盖旱种处理的生物量还略大于常规水田,表明覆盖旱种水稻有增产的可能和潜力。 |
| 关键词: 水稻栽培模式 覆盖旱种 农学性状 产量变化 |
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| 基金项目:国家自然科学基金与德国科学基金会合作项目(39970420)；广东省科技厅国际合作项目(C50208) |
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| Agronomic parameters of rice yield components and yield response to ground cover rice production system (GCRPS) |
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| Abstract: |
| Field experiments were conducted to study the influence of ground cover rice production system (GCRPS) (plastic mulching,straw mulching and bare upland) on agronomic parameters of yield components and rice grain yield response compared with normal paddy field under controlled irrigation production condition.The results showed that rice tillers in GCRPS were earlier and more than that of normal paddy rice,plastic mulching better than that of straw mulching.To increase the basal seedling at transplanting or sawing could increase percentage of fertile tillers and decrease percentage of unfilled grains.Leaf area index (LAI) of rice in GCRPS decreased in the order of plastic mulching treatment>straw mulching treatment>bare soil treatment among the treatments.The two-year results showed that the rice grain yields in GCRPS were slightly or significantly lower than that of normal paddy rice,but there was no statistical difference of above ground biomass between GCRPS and normal paddy,even if the biomass of plastic mulching treatment in GCRPS was higher than that of normal paddy.The results imply that there exists a great potential or possibility to receive high grain yield in GCRPS. |
| Key words: rice growth pattern GCRPS agronomic characters yield change |
