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- Title
Effect of Different Nitrogen Application Rate on Rice Stem Characteristics.
- Authors
Wenbin XIONG; Fengying XU; Xiaoling WANG
- Abstract
The effects of different nitrogen application rate on the physical characteristics and anatomic structure of rice stems were investigated with rice cultivars Guangliangyou 1128 (with high resistance) and Zhunliangyou 527 (with low resistance) as materials. The results showed that, firstly, plant height, gravity center height and basal internode length of the 2 rice cultivars increased with the increase of nitrogen application rate, while wall thicknees and internode fiiling degree decreased. The breaking-resistance strength per stem and thrust-resistance strength of plants declined with the increase of nitrogen application rate. Secondly, as nitrogen input increased, the number of vascular bundles and the area of vascular bundles increased between the 2 rice cultivas. Thirdly, with the increase of nitrogen application rate, the stem section area of Guangliangyou 1128, which had strong lodging resistance, graduHy increased, while that of Zhunliangyou 527 increased firstly and then decreased. The maximum application amount of nitrogen was 240 kg/hm2. Nitrogen fertilizer mainly affected the relative gravity center height, stem WXI thicknees and internode fiiling degree of the 2 cultivars, thereby reducing the basal stem breaking resistance and plant thrust-resistance strength.
- Subjects
NITROGEN in agriculture; NITROGEN fertilizers; RICE breeding; PLANT breeding; PLANT growth
- Publication
Agricultural Biotechnology (2164-4993), 2018, Vol 7, Issue 5, p204
- ISSN
2164-4993
- Publication type
Article