Grain number responses to pre-anthesis dry matter and nitrogen in improving wheat yield in the Huang-Huai Plain.
Grain number responses to pre-anthesis dry matter and nitrogen in improving wheat yield in the Huang-Huai Plain.
复制标题
黄淮平原籽粒数对花前干物质和氮肥提高小麦产量的响应
DOI：
10.1038/s41598-018-25608-0
复制
发表时间：
2018-05-08
影响因子：
4.6
通讯作者：
Guo T
中科院分区：
文献类型：
--
作者：
Duan J;Wu Y;Zhou Y;Ren X;Shao Y;Feng W;Zhu Y;Wang Y;Guo T
不同生态区和产量水平的小麦产量构成因素存在差异。花前干物质（DM）和氮素（N）对籽粒数的增产效应一直是在穗部进行研究，而忽略了非穗部营养或总体分配的影响。2012-2015年在黄淮平原进行了2种不同水氮模式和栽培管理模式的田间试验，研究了不同产量水平下小麦花前穗部和非穗部干物质和氮素含量与穗粒数的关系。结果表明，产量低于7500 kg/hm ~ 2时，产量的提高主要依靠增加穗粒数或穗数，或两者兼而有之;产量高于7500 kg/hm ~ 2时，产量的提高主要依靠穗粒数。在高产和低产水平下，拔节至开花期的GNs与地上部干物质积累量呈显著正相关。春季DM的快速增长可获得更高的GN。穗部和非穗部干物质和氮含量均与粒重呈极显著正相关，穗部干物质分配率与粒重呈正相关，而穗部氮分配率与粒重呈显著负相关。氮素在非穗部器官中分配的改善和干物质在穗部器官中分配的改善有助于提高粒数。
Wheat yield components vary between different ecological regions and yield levels. Grain number responses to pre-anthesis dry matter (DM) and nitrogen (N) in increasing yield were always investigated in spike organs, neglecting the effect of non-spike organ nutrition or overall distribution. This paper determined the relationships between grain number and pre-anthesis DM and N in spike and non-spike organs under different yield levels, with using two sorts of field experiments (different water-nitrogen modes and cultivation management patterns) from 2012–2015 in Huang-Huai plain. The results indicated that improving yield under yield of <7500 kg ha−1depends on increasing grain number per spike (GNs) or spike number (SN) or both, increased yield under higher yield of >7500 kg ha−1mainly depends on GNs. GNs showed significant positive relationships with above-ground DM accumulation from jointing to anthesis under high or low yield levels. Rapid DM growth in spring achieves higher GNs. Spike and non-spike DM and N contents both demonstrated strong positive relationships with GNs, spike DM distribution also shows a positive correlation, but spike N distribution ratio show negatively correlation with GNs. Improved N distribution in non-spike organs and DM partition in spike organs conduce to increasing GNs.
登录
查看更多内容
影响因子：
4.6
作者：
Hu J;Kong L;Gao J;Hu W;Guan X;Lu JJ
通讯作者：
Lu JJ
DOI：
10.1071/pp9860767
发表时间：
1986-01-01
期刊：
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
影响因子：
--
作者：
FISCHER, RA;STOCKMAN, YM
通讯作者：
STOCKMAN, YM
影响因子：
5.8
作者：
Bancal, Pierre
通讯作者：
Bancal, Pierre
影响因子：
5.8
作者：
Demotes-Mainard, S;Jeuffroy, MH
通讯作者：
Jeuffroy, MH
影响因子：
2
作者：
FISCHER, RA
通讯作者：
FISCHER, RA