A long-term field experiment (started at 2003) was conducted to determine the effects of different dce cultivation methods on growth characteristics and grain yield of late-season rice under double-rice cropping sys...A long-term field experiment (started at 2003) was conducted to determine the effects of different dce cultivation methods on growth characteristics and grain yield of late-season rice under double-rice cropping system in seasonal drought region of southeast China (Yujiang County, Jiangxi Province). The rice cultivation methods included no-tillage and flooded rice cultivation (N-F), no-tillage and non-flooded rice cultivation with straw mulching (N-SM), and no-tillage and non-flooded rice cultivation without straw mulching (N-ZM). There was no significant difference in rice grain yield between the N-SM and N-F treatments. However, the rice grain yields in the N-SM and N-F treatments were significantly higher than that in the N-ZM treatment. The late-season rice plants in the N-SM treatment had significantly higher numbers of effective panicles and total grains per hill compared with those in the N-ZM treatment. The above-ground dry matter of late-season rice was similar between the N-SM and N-F treatments. Compared with the N-F treatment, the N-ZM and N-SM treatments significantly decreased the leaf area at the heading stage. Moreover, the N-SM treatment could significantly increase total root length and root tip number at the grain-filling stage compared with the N-ZM treatment.展开更多
为探明洞庭湖平原双季稻区不同栽培方式对早稻生育期、干物质积累及产量的影响,以常规稻和杂交稻为材料,系统比较研究了塑料软盘育秧抛栽、手插和机插3种栽培方式。结果表明,与机插相比,抛栽和手插促进了早稻生育进程,全生育期缩短,抛...为探明洞庭湖平原双季稻区不同栽培方式对早稻生育期、干物质积累及产量的影响,以常规稻和杂交稻为材料,系统比较研究了塑料软盘育秧抛栽、手插和机插3种栽培方式。结果表明,与机插相比,抛栽和手插促进了早稻生育进程,全生育期缩短,抛栽和手插分别缩短5~8 d和2~4 d。群体根系和地上部干重均表现为抛栽>手插>机插,差异均达显著水平。成熟期植株根系和穗干物质占总干物质量的比例为抛栽>手插>机插,茎干物质的比例为手插>抛栽>机插;叶干物质比例在分蘖期和齐穗期为机插>手插>抛栽,灌浆期和成熟期为手插>抛栽>机插。分蘖期、齐穗期和灌浆期,抛栽和手插水稻叶片SPAD值均显著高于机插;成熟期,各处理间无显著差异。水稻叶面积指数表现为抛栽>手插>机插。不同栽培方式间水稻产量差异显著,抛栽最高,机插最低;抛栽和手插分别比机插增产1203.3~1346.7 kg hm–2和776.7~1045.4 kg hm–2。说明不同栽培方式水稻干物质积累和产量有各自特征,与手插和机插相比,抛栽处理干物质总量大而且分配合理,有利于改善产量构成因素,增加水稻产量。展开更多
基金the National High-Tech Research and Development Program of China(Grant No.2002AA2Z4331)for generous financial support
文摘A long-term field experiment (started at 2003) was conducted to determine the effects of different dce cultivation methods on growth characteristics and grain yield of late-season rice under double-rice cropping system in seasonal drought region of southeast China (Yujiang County, Jiangxi Province). The rice cultivation methods included no-tillage and flooded rice cultivation (N-F), no-tillage and non-flooded rice cultivation with straw mulching (N-SM), and no-tillage and non-flooded rice cultivation without straw mulching (N-ZM). There was no significant difference in rice grain yield between the N-SM and N-F treatments. However, the rice grain yields in the N-SM and N-F treatments were significantly higher than that in the N-ZM treatment. The late-season rice plants in the N-SM treatment had significantly higher numbers of effective panicles and total grains per hill compared with those in the N-ZM treatment. The above-ground dry matter of late-season rice was similar between the N-SM and N-F treatments. Compared with the N-F treatment, the N-ZM and N-SM treatments significantly decreased the leaf area at the heading stage. Moreover, the N-SM treatment could significantly increase total root length and root tip number at the grain-filling stage compared with the N-ZM treatment.
文摘为探明洞庭湖平原双季稻区不同栽培方式对早稻生育期、干物质积累及产量的影响,以常规稻和杂交稻为材料,系统比较研究了塑料软盘育秧抛栽、手插和机插3种栽培方式。结果表明,与机插相比,抛栽和手插促进了早稻生育进程,全生育期缩短,抛栽和手插分别缩短5~8 d和2~4 d。群体根系和地上部干重均表现为抛栽>手插>机插,差异均达显著水平。成熟期植株根系和穗干物质占总干物质量的比例为抛栽>手插>机插,茎干物质的比例为手插>抛栽>机插;叶干物质比例在分蘖期和齐穗期为机插>手插>抛栽,灌浆期和成熟期为手插>抛栽>机插。分蘖期、齐穗期和灌浆期,抛栽和手插水稻叶片SPAD值均显著高于机插;成熟期,各处理间无显著差异。水稻叶面积指数表现为抛栽>手插>机插。不同栽培方式间水稻产量差异显著,抛栽最高,机插最低;抛栽和手插分别比机插增产1203.3~1346.7 kg hm–2和776.7~1045.4 kg hm–2。说明不同栽培方式水稻干物质积累和产量有各自特征,与手插和机插相比,抛栽处理干物质总量大而且分配合理,有利于改善产量构成因素,增加水稻产量。