中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > The effects of water and nitrogen on the roots and yield of upland and paddy rice 农业科学学报 (英文) 2020,19 (5)
Position: Home > Articles > The effects of water and nitrogen on the roots and yield of upland and paddy rice Journal of Integrative Agriculture 2020,19 (5)

The effects of water and nitrogen on the roots and yield of upland and paddy rice

作  者：
Zhang Ya-jie;Xu Jing-nan;Cheng Ya-dan;Wang Chen;Liu Gao-sheng;Yang Jian-chang
单  位：
Yangzhou Univ, Coinnovat Ctr Modern Prod Technol Grain Crops, Jiangsu Key Lab Crop Genet & Physiol, Yangzhou 225009, Jiangsu, Peoples R China
关键词：
upland rice;paddy rice;root traits;root architecture;soil water potential;nitrogen
摘  要：
It is of great significance to study the root characteristics of rice to improve water and nitrogen (N) use efficiency and reduce environmental pollution. This study investigated whether root traits and architecture of rice influence grain yield, as well as water and N utilization efficiency. An experiment was conducted using the upland rice cultivar Zhonghan 3 (a japonica cultivar) and paddy rice cultivar Huaidao 5 (also a japonica cultivar) using three N levels, namely, 2 g urea/pot (low amount, LN), 3 g urea/pot (normal amount, NN), and 4 g urea/pot (high amount, HN), and three soil water potentials (SWPs, namely, well-watered (0 kPa), mildly dried (-20 kPa) and severely dried (-40 kPa). The results showed that with decreasing SWP, the percentage of upland rice roots increased in the 0-5 cm tillage layer, and decreased in the 5-10 and 10-20 cm tillage layers, whereas paddy rice roots showed the opposite trend. With increasing amounts of N, the yield of upland and paddy rice increased, and the percentage of root volume ratios of the two rice cultivars in the 0-5 and 5-10 cm tillage layers increased, whereas that in the 10-20 cm tillage layer decreased. The roots of upland rice are mainly distributed in the 10-20 cm tillage layer, whereas most paddy rice roots are in the 0-5 cm tillage layer. These results indicate that the combination of -20 kPa SWP and NN in upland rice and 0 kPa SWP and LN in paddy rice promotes the growth of the root system during the middle and late stages, which in turn may decrease the requirements for water and N fertilizer and increase rice yield.

相似文章

PDF下载 PDF预览
导出引用
计量
文章访问数: 6
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46