【摘要】：湖北平原地區(qū)夏季降水多,水稻易受澇害,為了解澇對(duì)雜交水稻生長及產(chǎn)量的影響,以雜交中稻豐兩優(yōu)香1號(hào)為試材,在拔節(jié)期、孕穗期和灌漿期分別設(shè)計(jì)不同澇淹深度和受澇時(shí)間的脅迫試驗(yàn)。結(jié)果表明:雜交中稻受澇脅迫后,植株高度、節(jié)間長度均增長,灌漿期、孕穗期受澇脅迫后植株高度增長幅度大于拔節(jié)期,可用二元一次方程擬合水稻株高增長量(Y_(PH))、節(jié)間長度(Y_(IL))與受澇天數(shù)(D)和澇淹深度(H)之間的關(guān)系,澇淹深度對(duì)植株高度、節(jié)間長度的影響大于受澇天數(shù)。不同生育期受澇水稻減產(chǎn)順序表現(xiàn)為孕穗期拔節(jié)期灌漿期,可用二元一次方程擬合水稻相對(duì)產(chǎn)量(Ry)與受澇天數(shù)(D)和澇淹深度(H)的關(guān)系,拔節(jié)期和灌漿期受澇天數(shù)對(duì)產(chǎn)量的影響大于受澇深度,而孕穗期澇淹深度的影響大于受澇天數(shù)。拔節(jié)期受澇脅迫結(jié)實(shí)率顯著下降,孕穗期結(jié)實(shí)率和千粒重顯著下降,灌漿期主要表現(xiàn)為結(jié)實(shí)率顯著下降,其次是千粒重下降。拔節(jié)期、孕穗期和灌漿期受澇脅迫后,穗下部籽粒結(jié)實(shí)率的相對(duì)濕害指數(shù)分別為0.69%~44.01%、20.87%~71.14%(沒頂淹9d為100%)、3.15%~81.84%;穗中部籽粒結(jié)實(shí)率的相對(duì)濕害指數(shù)分別為4.49%~32.36%、14.31%~62.21%(沒頂淹9d為100%)、10.02%~66.89%;穗上部籽粒結(jié)實(shí)率的相對(duì)濕害指數(shù)分別為-0.77%~14.72%、7.64%~50.10%(沒頂淹9d為100%)、2.75%~59.66%。
[Abstract]:In order to solve the effect of waterlogging on the growth and yield of hybrid rice, the middle hybrid rice Fengliangyou Xiang 1 was used as the test material at jointing stage. Different waterlogging depth and waterlogging time stress tests were designed at booting stage and filling stage respectively. The results showed that the plant height and Internode length of middle hybrid rice increased after waterlogging stress, and the increase of plant height at filling stage and booting stage was larger than that at jointing stage. The relationship between Y _ (PH), Internode length (Y _ (IL) and the days of waterlogging (D) and the depth of waterlogging (H) can be fitted by the binary one-time equation, and the depth of waterlogging and flooding on the height of rice plants. The effect of Internode length was greater than that of waterlogging days. The yield reduction order of waterlogged rice at different growth stages was as follows: grain filling at booting stage. The relationship between relative yield (Ry) and waterlogging days (D) and flooding depth (H) of rice could be fitted by binary one-time equation. The effect of waterlogging days in jointing stage and filling stage on yield was greater than that in waterlogging depth, and the effect of waterlogging depth in booting stage was greater than that in waterlogging days. The seed setting rate at jointing stage was significantly decreased under waterlogging stress, the seed setting rate and 1000-grain weight at booting stage were significantly decreased, and the seed setting rate decreased significantly at the filling stage, followed by the decrease in 1000-grain weight. At jointing stage, booting stage and filling stage, the relative wet damage index of seed setting rate was 0.69% and 44.01%, 20.87%, 71.14% (100%) and 3.15% (81.84%), respectively. The relative wet damage index of seed setting rate in middle panicle was 4.49% and 32.36%, 14.31% and 62.21% (100%), 10.02% and 66.89% respectively. The relative wet damage index of seed setting rate in upper ear was-0.77% ~ 14.72%, 7.64% ~ 50.10% (100%) and 2.75% ~ 59.66% respectively.
【作者單位】： 長江大學(xué)農(nóng)學(xué)院;濕地生態(tài)與農(nóng)業(yè)利用教育部工程研究中心;
【基金】：農(nóng)業(yè)部公益性行業(yè)(農(nóng)業(yè))科研專項(xiàng)(201203032) 湖北省重點(diǎn)(優(yōu)勢(shì))學(xué)科作物學(xué)(長江大學(xué))(2013XKJS)
【分類號(hào)】：S511.32;S422

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 熊洪;;洪水淹沒雜交中稻后的重大補(bǔ)救措施 蓄留再生稻[J];四川農(nóng)業(yè)科技;2007年07期

，

本文編號(hào)：2449229