| 棉株果枝部位、温光复合因子及施氮量对纤维伸长的影响 |
| |
| 引用本文： | 赵文青,孟亚利,陈美丽,李文峰,周治国.棉株果枝部位、温光复合因子及施氮量对纤维伸长的影响[J].作物学报,2011,37(6):1077-1086. |
| |
| 作者姓名： | 赵文青 孟亚利 陈美丽 李文峰 周治国 |
| |
| 作者单位： | 南京农业大学/农业部南方作物生理生态重点开放实验室/江苏省信息农业高技术研究重点实验室，南京 210095 |
| |
| 摘 要： | 以杂交棉(科棉1号)和常规棉(美棉33B)品种为材料，设置异地分期播种和施氮量试验，使棉株不同果枝部位棉铃处于相同环境条件下或相同果枝部位棉铃处于不同环境条件下，研究棉株果枝部位、温光复合因子及施氮量对纤维伸长的影响。结果表明, 在相同环境条件下，棉株中部果枝铃的纤维长度虽稍高于其他部位，但纤维伸长动态变化及最终纤维长度在不同果枝部位间的差异均未达显著水平。棉纤维伸长发育期的累积辐热积PTP可综合温光复合因子的效应，其与棉纤维最大伸长速率Vmax呈极显著线性正相关，与纤维快速伸长持续期T呈极显著线性负相关，与棉纤维长度理论最大值Lenm呈二次曲线函数关系，可以作为表征棉纤维伸长发育温光复合因子的指标。当棉纤维伸长发育期内PTP在335 MJm–2左右时，Lenm最大(科棉1号、美棉33B分别为30.94、30.31 mm)，Vmax在1.3 mm d–1左右，T在16 d左右。氮素水平与温光复合因子对纤维长度的影响存在补偿效应，随施氮量的增加，棉纤维长度达到最大值时对应的PTP减小。当棉纤维伸长发育期内PTP达到240 MJm–2时(科棉1号、美棉33B分别为237.6、241.6 MJm–2)，240 kg N hm–2施氮量下的棉铃对位叶叶氮浓度(NA)更适宜棉纤维伸长；PTP低于此值时，增加施氮量(480 kg N hm–2)可减小因累积辐热积降低而造成的棉纤维长度缩短的幅度。
|
| 关 键 词： | 棉花 纤维长度 果枝部位 温光复合因子 叶氮浓度 |
| 收稿时间： | 2010-11-02 |
Effects of Fruiting Branch Position, Temperature-light Factors and Nitrogen Rates on Cotton (Gossypium hirsutum L.)Fiber Elongation |
| |
| ZHAO Wen-Qing,MENG Ya-Li,CHEN Mei-Li,LI Wen-Feng,ZHOU Zhi-Guo.Effects of Fruiting Branch Position, Temperature-light Factors and Nitrogen Rates on Cotton (Gossypium hirsutum L.)Fiber Elongation[J].Acta Agronomica Sinica,2011,37(6):1077-1086. |
| |
| Authors: | ZHAO Wen-Qing MENG Ya-Li CHEN Mei-Li LI Wen-Feng ZHOU Zhi-Guo |
| |
| Institution: | Key Laboratory of Crop Physiology & Ecology in Southern China, Ministry of Agriculture / Hi-Tech Key Laboratory of Information Agriculture / Nanjing Agricultural University, Nanjing 210095, China |
| |
| Abstract: | Cotton fiber length is one of the important criteria of cotton quality, and fiber elongation is influenced by many factors. To study effect of fruiting-branch position, temperature-light factor and nitrogen rates on dynamic changes of cotton fiber length, we carried out the field experiments in Nanjing (118º50′E, 32º02′N, middle lower reaches of Yangtze River Valley) and Xuzhou (117°11′E, 34°15′N, Yellow River Valley). Cotton cultivars of Kemian 1 and NuCOTN 33B were used. Two sowing dates and three nitrogen application levels were applied, thus cotton fiber developing process can be arranged at different fruiting-branch position and ecological conditions. The results showed that cotton bolls developed in the middle-branch position produced longer fiber than that in lower- and upper-branch positions, but the dynamic changes of fiber length were not significant among different fruiting branches. PTP can be an indicator assessing temperature-light effect during cotton fiber elongation period. The maximum elongation rate (Vmax) and duration of fiber speedy elongation period (T) were linearly corelated with PTP, while the theoretical maximum of cotton fiber length (Lenm) was quadratic with PTP. The longest Lenm (30.94 and 30.31 mm for Kemian 1 and NuCOTN 33B, respectively) was obtained at PTP of 335 MJm–2 in cotton fiber elongation period (333.3 and 337.9 MJ·m–2 for Kemian 1 and NuCOTN 33B,respectively), when Vmax was 1.3 mm d–1 and T was 16 d. There exists an interaction between N fertilization and PTP on fiber elongation. As N fertilization increased, values of PTP for obtaining the longest Lenm decreased. And when PTPwas greater than 240 MJm–2 (237.6 and 241.6 MJm–2 for Kemian 1 and NuCOTN 33B, respectively), NA under 240 kg N ha–1 was more suitable for the elongation of cotton fiber; while PTP was less than that value, NA under 480 kg N ha–1 was more appropriate. |
| |
| Keywords: | Gossypium hirsutum L Fiber length Fruiting-branch position Temperature-light factor Leaf nitrogen concentration |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《作物学报》浏览原始摘要信息 |
| 点击此处可从《作物学报》下载免费的PDF全文 |
|
