摘要
为探明施氮量对不同水稻品种产量、氮肥利用率和农艺性状的影响,以适合江苏省种植的12个中粳稻(含籼/粳杂交稻)品种为材料,大田种植,设置0N(全生育期不施氮)、200N(全生育期施纯氮200kg/hm2)和360N(全生育期施纯氮360kg/hm2)3个施氮量处理,研究各品种产量、氮肥利用率和一些农艺性状的差异。结果表明:甬优2640在3个施氮水平产量均最高,库容量大是其高产的主要原因。其他品种产量对氮肥响应的表现不一。在较低氮(0N、200N)条件下,淮稻13号和武运粳30的产量较高,宁粳1号和扬粳4038的产量较低。在高氮(360N)条件下,宁粳1号和扬粳4038产量较高。在较低施氮量条件下,产量和氮肥利用率较高的品种具有较高的干物质积累量、茎蘖成穗率、叶面积指数、粒叶比及群体生长速率,这些指标可作为筛选氮高效品种的农艺性状指标。
The objective of the study was to understand the effects of nitrogen （N） rates on grain yield, N use efficiency （NUE）, and agronomic traits of different rice cultivars. Twelve japonica rice cultivars （including indica/ japonica cultivars） suitable for planting in Jiangsu Province were field planted. Three N rates, ON （no N application）, 200N （200kg/hm2） and 360N （360kg/hm2） were applied in the experiment. The performances of grain yield, NUE and some agronomic traits were investigated. The results showed that the indica/japonica hybrid Yongyou 2640 had the highest grain yield among 12 tested cultivars under the three N application rates, mainly due to its large sink capacity. The response of grain yield to N rates varied with cultivars except for Yongyou 2640. Under the lower N rates （ON and 200N）, the cultivars of Huaidao 13 and Wuyunjing 30 exhibited a higher yield, whereas the cultivars of Ningjing 1 and Yangjing 4038 produced a lower grain yield and NUE. However, a higher grain yield was observed for Ningjing 1 and Yangjing 4038 under a higher N rate （360N）. The cultivars showed a higher grain yield and NUE under a lower N rates possessed a higher dry matter accumulation, more productive tillers, larger leaf area index, greater grain-leaf ratio and crop growth rate. These traits could be used as indexes in selecting a N-efficient rice cultivar.
作者
章星传
黄文轩
朱宽宇
王志琴
杨建昌
Zhang Xingchuan;Huang Wenxuan;Zhu Kuanyu;Wang Zhiqin;Yang Jianchang(College of Agronomy,Yangzhou University/Jiangsu Key Laboratory of Crop Genetics and Physiology/ Co-Innovation Center for Modern Production Technology of Grain Crops,Yangzhou 225009,Jiangsu,Chin)
出处
《作物杂志》
CAS
北大核心
2018年第4期69-78,共10页
Crops
基金
国家“十二五”科技支撑计划资助项目(2014AA10A605)
国家重点研发计划资助项目(2016YPD0300206-4)
江苏高校优势学科建设工程资助项目
关键词
水稻
产量
氮肥利用率
农艺性状
氮高效品种
Rice
Grain yield
Nitrogen use efficiency
Agronomic traits
Nitrogen-efficient cultivar
