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[1]韦叶娜,赵祥,杨国涛,等.栽培密度对不同穗型水稻群体小气候及产量构成的影响[J].应用与环境生物学报,2018,24(04):813-823.[doi:10.19675/j.cnki.1006-687x.2017.12049]
 WEI Yena,ZHAO Xiang,YANG Guotao,et al.Effects of planting density on the microclimate of rice population with different panicle-types and its yield components[J].Chinese Journal of Applied & Environmental Biology,2018,24(04):813-823.[doi:10.19675/j.cnki.1006-687x.2017.12049]
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栽培密度对不同穗型水稻群体小气候及产量构成的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
24卷
期数:
2018年04期
页码:
813-823
栏目:
研究论文
出版日期:
2018-08-20

文章信息/Info

Title:
Effects of planting density on the microclimate of rice population with different panicle-types and its yield components
作者:
韦叶娜赵祥杨国涛王学春彭友林胡瑶胡运高
1西南科技大学水稻研究所 绵阳 621010 2四川农业大学 成都 611130
Author(s):
WEI Yena1 ZHAO Xiang1 YANG Guotao1 2 WANG Xuechun1 PENG Youlin1 HU Yao1 & HU Yungao1**
1 Rice Research Institute, Southwest University of Science and Technology, Mianyang 621010, China 2 Sichuan Agricultural University, Chengdu 611130, China
关键词:
水稻穗型密度小气候产量群体特征
Keywords:
rice panicle-type planting density microclimate yield population characteristics
分类号:
S511
DOI:
10.19675/j.cnki.1006-687x.2017.12049
摘要:
通过裂区试验(品种为主因素)分析R498(弯曲穗)及R499(直立穗)在0.23 m(行距)× 0.12 m(穴距)、0.27 m × 0.14 m、0.33 m × 0.17 m、0.38 m × 0.20 m、0.40 m × 0.21 m栽培密度条件(副因素)下齐穗期和齐穗后20 d群体小气候及群体特征的响应情况. 结果表明,在各栽培密度条件下,R499齐穗期群体最高温度平均值均较R498高1.52 ℃,齐穗后20 d,R499群体最高温度平均值较R498低0.66 ℃;齐穗期,R498、R499在稀植(0.38 m × 0.20 m、0.40 m × 0.21 m)时日平均光照强度较强,其中较最低光照分别高43.56%、16.22%,而齐穗后20 d,R498在密植(0.23 m × 0.12 m、0.27 m × 0.14 m)时日平均光照受抑制,R499在稀植时受抑制;R498、R499垂直光照在稀植时降低程度最大,在齐穗期分别降低97.96%、92.56%,齐穗后20 d分别降低94.81%、91.10%;随栽培密度的减小,R499株高、分蘖、穗弯曲度变化程度较R498更大;R498、R499在0.38 m × 0.20 m处理下纹枯病发病率最严重,分别为66.67%、68.89%;两个材料产量均在0.27 m × 0.14 m处理下有最大值,且增产是通过有效穗数、穗重来实现的,而当密度过度减小时,R499产量性状将不再增长. 综上,弯曲穗型水稻(R498)不适宜过度密植及稀植,直立穗型水稻(R499)可适当密植. (图8 表3 参41)
Abstract:
Split-plot field experiments, with variety as the main plot, were designed to analyze the microclimate and character of R498 (curved panicle) and R499 (erect panicle) varieties of rice during the full heading day and on the 20th day after full heading. The planting densities assigned to the subplots were 0.23 m (line spacing) × 0.12 m (hole spacing), 0.27 m × 0.14 m, 0.33 m × 0.17 m, 0.38 m × 0.20 m, and 0.40 m × 0.21 m. The results showed that for all the planting densities, the maximum temperature of R499 increased by 1.52 ℃ on an average during the full heading stage, but decreased by 0.66 ℃ on the 20th day after full heading, in comparison to those of R498. The mean daily light intensities of R498 and R499 in sparse planting (0.38 m × 0.20 m, 0.40 m × 0.21 m) were higher than those of other planting density treatments during the full heading stage, being 43.56% and 16.22% higher, respectively, than that of the lowest daily light intensity. The daily light intensity of R498 was hindered by close planting (0.23 m × 0.12 m, 0.27 m × 0.14 m) while that of R499 was inhibited by sparse planting on the 20th day after the full heading stage. The rates of decrease of vertical light intensity of R498 and R499 in sparse planting were the highest among all the planting density treatments, their rates of decrease being 97.96% and 92.56%, respectively, during the full heading stage, and 94.81% and 91.10%, respectively, on the 20th day after the full heading stage. When the planting density was decreased, the variability of plant height, tiller number, and panicle curvature were greater for R499 than those of R498. The rates of incidence of sheath blight for R498 and R499 in the planting specification of 0.38 m × 0.20 m were 66.67% and 68.89%, respectively, which was the most serious among all the planting density treatments. On increasing the effective spike number and panicle weight, both R498 and R499 produced the highest yields with the planting specification of 0.27 m × 0.14 m, among all the planting density treatments. Even when the density was excessively reduced, the value of yield components did not increase any further. Thus, it is better to plant rice with curved panicles (R498) in a reasonable planting density (neither too close nor too sparse), and to plant rice with erect panicles in a reasonably close planting density.

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42

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更新日期/Last Update: 2018-08-25