涝胁迫对杂交中稻形态和产量的影响
发布时间：2019-03-29 06:13
【摘要】：湖北平原地区夏季降水多,水稻易受涝害,为了解涝对杂交水稻生长及产量的影响,以杂交中稻丰两优香1号为试材,在拔节期、孕穗期和灌浆期分别设计不同涝淹深度和受涝时间的胁迫试验。结果表明:杂交中稻受涝胁迫后,植株高度、节间长度均增长,灌浆期、孕穗期受涝胁迫后植株高度增长幅度大于拔节期,可用二元一次方程拟合水稻株高增长量(Y_(PH))、节间长度(Y_(IL))与受涝天数(D)和涝淹深度(H)之间的关系,涝淹深度对植株高度、节间长度的影响大于受涝天数。不同生育期受涝水稻减产顺序表现为孕穗期拔节期灌浆期,可用二元一次方程拟合水稻相对产量(Ry)与受涝天数(D)和涝淹深度(H)的关系,拔节期和灌浆期受涝天数对产量的影响大于受涝深度,而孕穗期涝淹深度的影响大于受涝天数。拔节期受涝胁迫结实率显著下降,孕穗期结实率和千粒重显著下降,灌浆期主要表现为结实率显著下降,其次是千粒重下降。拔节期、孕穗期和灌浆期受涝胁迫后,穗下部籽粒结实率的相对湿害指数分别为0.69%~44.01%、20.87%~71.14%(没顶淹9d为100%)、3.15%~81.84%;穗中部籽粒结实率的相对湿害指数分别为4.49%~32.36%、14.31%~62.21%(没顶淹9d为100%)、10.02%~66.89%;穗上部籽粒结实率的相对湿害指数分别为-0.77%~14.72%、7.64%~50.10%(没顶淹9d为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.
【作者单位】： 长江大学农学院;湿地生态与农业利用教育部工程研究中心;
【基金】：农业部公益性行业(农业)科研专项(201203032) 湖北省重点(优势)学科作物学(长江大学)(2013XKJS)
【分类号】：S511.32;S422
本文编号：2449229
[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.
【作者单位】： 长江大学农学院;湿地生态与农业利用教育部工程研究中心;
【基金】：农业部公益性行业(农业)科研专项(201203032) 湖北省重点(优势)学科作物学(长江大学)(2013XKJS)
【分类号】：S511.32;S422
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