水氮耦合对滴灌春小麦干物质积累分配与运转规律的影响
摘要[目的]明确滴灌春小麦干物质积累与分配特征的水氮效应。[方法]以新春6号为供试材料,设置不同的灌水、施氮处理,对小麦植株各器官干物质积累及分配进行研究。[结果]春小麦地上部分干物质积累量呈'S“形变化,积累速率最大时期在拔节期”灌浆期。总干质量积累较大的处理为W3N2、W2N2、W2N3和W3N1,分别达15.16、14.63、13.25和13.19 t/hm2。生育期内,N2处理的总干物质量、茎秆和穗器官干物质平均转移率分别为14.06 t/hm2、45.34%和30.83%,而成熟期内W2处理的相应值分别为13.47 t/hm2、31.14%和60.80%,均明显高于其他处理。各因素的总干物质积累影响效应从大到小依次为水氮耦合、水分、氮素,对穗部干物质影响效应从大到小依次为水氮耦合、氮素、水分。 [结论] 水氮耦合调控效应是调节滴灌春小麦生长的主要因素,生产中,采用中氮适水策略,保证生育前期的充足水分、中后期的适当氮素水平是促进春小麦健壮生长、提高产量的关键。
关键词春小麦;水氮耦合;干物质;积累;分配
中图分类号S512.1+2文献标识码A文章编号0517-6611(2017)19-0038-05
Effects of Water and Nitrogen Coupling on Dry Matter Accumulation,Distribution and Transferring Regularity of Spring Wheat under Drip Irrigation
ZHANG Songchao,CHEN Hui,HUANG Zhenjiang,WANG Jichuan* et al
(College of Plant Science, Tarim University, Alar, Xinjiang 843300)
Abstract[Objective]To clarify the effects of water and nitrogen on dry matter accumulation and distribution of spring wheat under drip irrigation. [Method] Took Xinchun 6 as test materials, different irrigation, nitrogen treatments were set to research wheat dry matter accumulation and distribution in different organs. [Result]The dry matter accumulation of aboveground parts of spring wheat was S shape curve, with the maximum accumulation rate being from jointing stage to filling stage. The treatments with higher total dry weight were W3N2, W2N2, W2N3 and W3N1, which dry weight were 15.16,14.63, 13.25 and 13.19 t/hm2, respectively.The...
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