摘要
以粳稻品种武运粳24为材料,设置直播稻Ⅰ(6月1日播种)、直播稻Ⅱ(6月17日播种)、手栽秧和机插秧4个处理,研究了不同播栽方式对水稻生长发育特性的影响。结果表明:不同播栽方式对水稻生育期影响显著,手栽秧生育期最长,机插秧其次,直播稻最短;机插秧水稻产量最高,直播稻产量最低;生物量上,水稻生育前期手栽秧较大,机插秧相对较小,到水稻成熟期直播稻Ⅱ的生物量最小,机插秧和手栽秧大致相当;叶面积指数上,水稻生育前期,手栽秧最大,抽穗时,不同播栽方式水稻叶面积指数无显著差异,水稻生育后期,直播稻叶面积指数下降较快,手栽秧和机插秧水稻叶面积指数较直播稻显著提高;不同生育阶段,不同播栽方式水稻光合势均是直播稻较小,手栽秧和机插秧较大;群体生长率上,水稻生育前期直播稻Ⅰ和手栽秧较大,水稻生育后期直播稻Ⅱ显著提高;水稻抽穗期单位干重根系的α-萘胺氧化量,机插秧要显著大于手栽秧和直播稻;水稻分蘖中期和拔节期手栽秧和直播稻Ⅰ的叶片叶绿素含量较高,抽穗期到成熟期均是机插秧叶片叶绿素含量最高。综上所述,机插秧水稻生育期天数相对较长,生育前期生长良好,中后期叶面积指数高、光合势强、叶片叶绿素含量较高、根系活力强,有利于水稻种植的高产稳产。
Taking Japonica rice cuhivar Wuyunjing 24 as test material, this paper studied the effects of different planting modes on the growth and development characteristics of rice in Tai Lake area of East China. Four treatments were installed, i. e. , direct seeding on June 1, direct seeding on June 17, manual transplanting, and mechanical transplanting. Different planting modes had significant effects on the rice growth period, with the duration of the growth period be- ing the longest under manual transplanting, followed by mechanical transplanting, and direct see- ding. The rice yield was the highest under mechanical transplanting, and the lowest under direct seeding. At the early growth stage of flee, the hiomass under manual transplanting was high, while that under mechanical transplanting was relatively low. At maturing stage, the biomass un- der direct seeding on June 17 was the lowest, while that under mechanical transplanting and man- ual transplanting was nearly the same. At early growth stage, the leaf area index was higher un- der manual transplanting than under other treatments; at heading stage, there was no significant difference in leaf area index among the treatments; at late growth stage, the leaf area index de- clined quickly under direct seeding, but increased significantly under manual transplanting and mechanical transplanting. Throughout the whole growth period, the photosynthetic potential under direct seeding was the lowest. Direct seeding on June 1 and manual transplanting promoted the rice growth rate at early growth stage, but direct seeding on June 17 increased the rice growth rate significantly at late growth stage. Mechanical transplanting increased the amount of oL-NA per unit dry weight of root at rice heading stage significantly. Manual transplanting and direct seeding on June 1 increased the leaf chlorophyll content at tillering and jointing stages, while mechanical transplanting promoted the leaf chlorophyll content from heading stage to maturing stage. In sum, under mechanical transp
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第9期2326-2331,共6页
Chinese Journal of Ecology
基金
公益性行业(农业)科研专项经费项目(201103001)
江苏省农业科技自主创新基金项目(CX(11)2033)资助
