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小麦干物质、果聚糖和氮的积累分配及其与籽粒产量和品质的关系 被引量:14
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作者 赵万春 高翔 +2 位作者 董剑 Bonnett D G O'Brien L 《西北农林科技大学学报(自然科学版)》 CSCD 北大核心 2005年第3期43-47,共5页
 在200kg/hm2施N条件下,对17个澳大利亚小麦品种的干物质、果聚糖、氮的积累分配及其与籽粒产量(GY)、籽粒氮产量(GNY)及籽粒氮含量(GNC)的关系进行了研究。结果表明,干物质、果聚糖和氮积累的模式相似,在叶片、茎秆和植株中分别于开...  在200kg/hm2施N条件下,对17个澳大利亚小麦品种的干物质、果聚糖、氮的积累分配及其与籽粒产量(GY)、籽粒氮产量(GNY)及籽粒氮含量(GNC)的关系进行了研究。结果表明,干物质、果聚糖和氮积累的模式相似,在叶片、茎秆和植株中分别于开花期、乳熟期和成熟期积累到最大值。在开花前,茎秆是贮存果聚糖的主要器官,叶片是氮的主要贮存器官,而在花期后,籽粒成为贮存果聚糖和氮最多的器官,其次为茎秆。从乳熟期至成熟期,随着干物质、果聚糖和氮在营养器官中积累的降低,GY、GNY和籽粒果聚糖积累快速增加。在多数取样期,植株干物质积累和果聚糖积累与GY和GNY呈极显著正相关,与GNC呈负相关;成熟期植株氮积累与GY呈显著负相关,与GNC显著正相关;在花期后,叶片和茎秆氮积累与GY和GNY呈显著负相关。 展开更多
关键词 小麦 干物质 果聚糖 积累与分配 籽粒氮产量 籽粒含量
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Effects of Irrigation on Nitrogen Metabolism and Yield of Strong Gluten Wheat 被引量:1
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作者 李晓 姚占军 +2 位作者 管涛 郭天财 冯伟 《Agricultural Science & Technology》 CAS 2010年第3期68-71,共4页
[Objective] The aim was to provide reference for the field irrigation management of high yield and quality cultivation of strong gluten wheat.[Method]Under field conditions,the effects of irrigation times on nitrogen ... [Objective] The aim was to provide reference for the field irrigation management of high yield and quality cultivation of strong gluten wheat.[Method]Under field conditions,the effects of irrigation times on nitrogen metabolism and yield of strong gluten wheat cultivar zhengmai 9023 were studied.[Result]The results indicated that NR activity,Chlorophyll and nitrogen content in flag leaf increased with irrigation times,and the irrigation treatment had obvious advantages during middle filling stage.Grain protein content showed "V" type change with grain filling going on,and protein content decreased when irrigation times going on.There was significant difference among treatments during early stage of grain filling,and the difference became smaller in the late grain filling stage.The grain yield and protein yield increased but the protein content decreased with increasing of irrigation times.[Conclusion] Increasing irrigation times properly could improve grain yield and protein yield per unit area,but reduce the grain protein content. 展开更多
关键词 Winter wheat IRRIGATION Nitrogen metabolism Grain yield
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Effects of Different Nitrogen Treatments on N use Efficiency and Grain Yield of Mechanically-transplanted Hybrid Rice
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作者 Chang YE Ke LIU +4 位作者 Shaowen LIU Jian LU Mengtao GAO Bilin LU Yunbo ZHANG 《Agricultural Science & Technology》 CAS 2017年第2期274-276,293,共4页
In order to investigate effects of topdressing on grain yield and N use efficiency of mechanically-transplanted hybrid rice, this experiment was conducted with 2-line hybrid rice cultivars, Quaniiangyou 1 and Quanlian... In order to investigate effects of topdressing on grain yield and N use efficiency of mechanically-transplanted hybrid rice, this experiment was conducted with 2-line hybrid rice cultivars, Quaniiangyou 1 and Quanliangyou 681 with 3 application levels of N fertilizer, No, N1, N2, respectively. The results showed that there were no significant differences in grain yields of the 2 varieties between treatments N1 and N2. It was indicated that N is not the factor which could limit grain yield within limited application levels of N fertilizer. High N fertilizer treatment could contribute to the formation of effective panicles and spikelets per panicle, but it could also lead to the decline in grain filling rate. It was suggested that lowering the amount of Nfertilizer could facilitate improvement of N-use efficiency. 展开更多
关键词 Mechanically-transplanted rice Grain yield N use efficiency
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