水稻不同生育期茎秆生化成分的变化及其与抗倒伏能力的关系

杨艳华1,2, 朱镇1, 张亚东1, 陈涛1, 赵庆勇1, 周丽慧1, 姚姝1, 王才林1,*
1江苏省农业科学院粮食作物研究所, 江苏省优质水稻工程技术研究中心, 国家水稻改良中心南京分中心, 南京210014; 2江 苏大学生命科学研究院, 江苏镇江212013

通信作者:王才林;E-mail: clwang@jaas.ac.cn;Tel: 025-84390307

摘 要:

以抗倒伏品种‘南粳44’、‘武运粳7号’与不抗倒伏品系‘宁7412’为试验材料, 通过对水稻不同生育期茎秆硅、钾、 钙、镁含量及可溶性糖含量的测定, 结合氮钾肥配比试验, 研究了水稻不同生育期茎秆硅、钾、钙、镁含量及可溶性糖含 量的变化及其与茎秆抗倒伏能力的关系。结果表明: 水稻茎秆的硅、钙、镁含量及可溶性糖含量随生育进程呈上升趋势, 而茎秆的钾含量呈现先降后升的趋势。在不同施肥水平条件下, 水稻茎秆的硅、钾、钙、镁含量及可溶性糖含量存在一 定的差异。抗倒伏品种‘南粳44’和‘武运粳7号’茎秆基部抗折力较强, 施肥对水稻茎秆基部抗折力有一定的影响。水稻生殖生育期茎秆的硅含量、可溶性糖含量与茎秆基部抗折力呈极显著正相关(P<0.01), 与水稻抗倒伏能力的强弱有一定的关系。

关键词:水稻; 生化成分; 抗折力; 倒伏指数; 抗倒性

收稿:2011-07-18   修定:2011-10-17

资助:江苏省农业科技自主创新基金(CX[10]401)。

Changes of Stem Biochemical Components in Different Growth Stages of Rice and Their Relationship with Lodging Resistance

YANG Yan-Hua1,2, ZHU Zhen1, ZHANG Ya-Dong1, CHEN Tao1, ZHAO Qing-Yong1, ZHOU Li-Hui1, YAO Shu1, WANG Cai-Lin1,*
1Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Jiangsu High Quality Rice R & D Center, Nanjing Branch of China National Center for Rice Improvement, Nanjing 210014, China; 2Institute of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu 212013, China

Corresponding author: WANG Cai-Lin; E-mail: clwang@jaas.ac.cn; Tel: 025-84390307

Abstract:

Changes of SiO2, K2O, calcium, magnesium, and soluble sugar contents in different growth stages of rice and their relationship with lodging resistance were investigated through nitrogen, potassium fertilizers test with three rice cultivars (‘Nanjing 44’ and ‘Wuyunjing 7’, lodging resistance; ‘Ning 7412’, easy lodging). The results indicated that SiO2, calcium, magnesium, and soluble sugar contents were basically increased with the development process. However, K2O content showed the trend of high-low-high. The SiO2, K2O, calcium, magnesium, and soluble sugar contents showed some differences in different fertilizer application level. Meanwhile, application of nitrogen and potassium fertilizer had obvious effect upon resistance snapping of rice basal stems. Correlation analysis showed that resistance snapping of rice basal stems was very significantly positive correlated to SiO2 and soluble sugar contents in rice stem of the reproductive stage (P<0.01), which had a certain relationship with lodging resistance of rice.

Key words: rice; biochemical components; resistance snapping; lodging index; lodging resistance

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