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应用生态学报 ›› 2004, Vol. ›› Issue (4): 646-650.

• 研究论文 • 上一篇    下一篇

不同养分和水分管理模式对水稻抗倒伏能力的影响

杨长明1,2, 杨林章2, 颜廷梅2, 欧阳竹1   

  1. 1. 中国科学院地理科学与资源研究所, 北京 100101;
    2. 中国科学院南京土壤研究所, 南京 210008
  • 收稿日期:2002-12-13 修回日期:2003-03-03 出版日期:2004-04-15
  • 通讯作者: 杨长明,男,1973年生,博士后,主要从事农业和土壤生态系统结构、功能的演变规律和调控机制方面的研究,已发表论文8篇.Tel:010-64856514;E-mail:yangcm@igsnrr.ac.cn
  • 基金资助:
    国家重点基础研究发展规划项目(G1999011802);中国科学院创新工程方向性资助项目(KZCX2413)

Effects of nutrient and water regimes on lodging resistance of rice

YANG Changming1,2, YANG Linzhang2, YAN Tingmei2, OUYANG Zhu 1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
  • Received:2002-12-13 Revised:2003-03-03 Online:2004-04-15

摘要: 大田试验下,通过对水稻茎秆基部物理性状、形态特征和硅、钾含量的测定和比较,系统研究了不同养分和水分管理模式对水稻茎秆抗倒伏能力的影响.结果表明,有机无机肥配施,特别是秸秆与化肥配施(CS)养分模式可明显提高水稻植株茎秆粗度、茎壁厚度和茎重,从而有效提高了基部茎秆的抗折力(RS)和明显降低了水稻的倒伏指数(LI),秸秆与化肥配施(CS)养分模式对水稻抗倒伏能力的效果在干湿交替(AWD)和控水模式(DRA)下表现更为明显.有机无机肥配施,特别是秸秆与化肥配施(CS)的养分模式在干湿交替(AWD)和控水模式(DRA)下更有助于提高水稻茎秆的硅、钾含量.相关分析表明,水稻基部茎秆茎壁厚度、茎重和抗折力与茎秆硅、钾含量存在显著(P<0.05)或极显著正相关(P<0.01).

关键词: 水稻, 抗倒伏, 养分和水分模式, 硅和钾含量

Abstract: A field experiment was conducted to study the effects of nutrient and water regimes on lodging resistance of rice plant by measuring and comparing the morphological and physical traits and the K2O and SiO2 contents of rice basal stems.The results indicated that a combined application of chemical fertilizers and organic materials,especially and rice straw (CS),could markedly increase the diameter,wall thickness and weight of basal stems,but reduce plant height,which resulted in the effective increase of snapping resistance (RS) and marked decrease of lodging index (LI).The effectiveness of the combined application of chemical fertilizers and rice straw (CS) on the increase of lodging resistance of rice plant was greater in alternate wetting and drying (AWD) and controlled irrigation (DRA),compared to continuous waterlogging (CWL).In addition,the combined application of chemical fertilizers and organic sources,especially with rice straw (CS),greatly increased the K2O and SiO2 contents in rice basal stems,especially in alternate wetting and drying (AWD) and controlled irrigation (DRA).Correlation analysis showed that the wall thickness,weight and snapping resistance of basal stems were significantly positively correlated to the K2O and SiO2 contents in rice basal stems (P<0.05 or P<0.01) in alternate wetting and drying (AWD) and controlled irrigation (DRA).

Key words: Rice, Lodging resistance, Nutrient and water regimes, SiO2 and K2O content

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