摘要
研究了不同肥力条件下的水稻抗倒伏能力与茎秆物理性状的关系及对产量的影响。以成熟期植株倾斜角度代表的抗倒伏能力与茎秆第1伸长节间长度呈极显著负相关,与基部茎秆粗度、厚度分别呈极显著正相关。不同株高品种的抗倒伏能力存在着品种间差异;施氮对水稻群体倒伏具有重要影响。就产量来说,最高产群体一般出现在750kg/hm2的中肥区。研究认为,通过降低第1和第2伸长节间长度,适当加强茎秆基部物理性状的强度、降低穗位、增加穗长和穗颈长度等,可以提高水稻植株的抗倒性,使倒伏与株高和生物产量的矛盾在更高产水平上得到统一。
Effect of lodging resistance on yield and its relationship with stalk physical characteristics of rice under different fertilizer condition was investigated. Results indicated that: Lodging resistance, expressed by the tilt angle of matured plant, was significantly negatively correlated with the length of the first internode, and positively correlated with the area and thickness at the base of stalk. Difference of lodging resistance among varieties was also found. Application of nitrogen also has obvious effect upon population lodging of rice. High yield was achieved in the medium fertilizer treatment. It was concluded that lodging resistance of rice would be improved by means of shortening the first and second internode, strengthening the hardness of the basal stalk, lowering the position of panicle, and elongating panicle or the neck-panicle internode. So the contradiction between lodging and plant height could be settled at a higher yield level.
出处
《吉林农业科学》
CSCD
2004年第4期6-11,共6页
Journal of Jilin Agricultural Sciences
关键词
水稻
抗倒性
茎秆物理性状
产量
Rice
Lodging resistance
Stalk physical characteristics
Yieldj
