干旱区生态环境知识资源中心(Arid): N-fertilizer postponing application improves dry matter translocation and increases system productivity of wheat/maize intercropping

Arid

DOI	10.1038/s41598-021-02345-5
	N-fertilizer postponing application improves dry matter translocation and increases system productivity of wheat/maize intercropping
	Xu, Ke; Chai, Qiang; Hu, Falong; Fan, Zhilong; Yin, Wen
通讯作者	Chai, Q (corresponding author), Gansu Agr Univ, Coll Agron, Lanzhou 730070, Peoples R China. ; Chai, Q (corresponding author), Gansu Agr Univ, State Key Lab Aridland Crop Sci, Lanzhou 730070, Peoples R China.
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2021
卷号	11 期号:1
英文摘要	Intercropping increases the grain yield to feed the ever-growing population in the world by cultivating two crop species on the same area of land. It has been proven that N-fertilizer postponed topdressing can boost the productivity of cereal/legume intercropping. However, whether the application of this technology to cereal/cereal intercropping can still increase grain yield is unclear. A field experiment was conducted from 2018 to 2020 in the arid region of northwestern China to investigate the accumulation and distribution of dry matter and yield performance of wheat/maize intercropping in response to N-fertilizer postponed topdressing application. There were three N application treatments (referred as N-1, N-2, N-3) for maize and the total amount were all 360 kg N ha(-1). N fertilizer were applied at four time, i.e. prior to sowing, at jointing stage, at pre-tasseling stage, and at 15 days post-silking stage, respectively. The N-3 treatment was traditionally used for maize production and allocations subjected to these four stages were 2:3:4:1. The N-1 and N-2 were postponed topdressing treatments which allocations were 2:1:4:3 and 2:2:4:2, respectively. The results showed that the postponed topdressing N fertilizer treatments boosted the maximum average crop growth rate (CGR) of wheat/maize intercropping. The N-1 and N-2 treatments increased the average maximum CGR by 32.9% and 16.4% during the co-growth period, respectively, and the second average maximum CGR was increased by 29.8% and 12.6% during the maize recovery growth stage, respectively, compared with the N-3 treatment. The N-1 treatment was superior to other treatments, since it increased the CGR of intercropped wheat by 44.7% during the co-growth period and accelerated the CGR of intercropped maize by 29.8% after the wheat had been harvested. This treatment also increased the biomass and grain yield of intercropping by 8.6% and 33.7%, respectively, compared with the current N management practice. This yield gain was primarily attributable to the higher total translocation of dry matter. The N-1 treatment increased the transfer amount of intercropped wheat by 28.4% from leaf and by 51.6% from stem, as well as increased the intercropped maize by 49.0% of leaf, 36.6% of stem, and 103.6% of husk, compared to N-3 treatment, respectively. Integrated the N fertilizer postponed topdressing to the wheat/maize intercropping system have a promotion effect on increasing the translocation of dry matter to grain in vegetative organs. Therefore, the harvest index of intercropped wheat and maize with N-1 was 5.9% and 5.3% greater than that of N-3, respectively. This demonstrated that optimizing the management of N fertilizer can increase the grain yield from wheat/maize intercropping via the promotion of accumulation and translocation of dry matter.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000722365800070
WOS关键词	NITROGEN-USE EFFICIENCY ; GRAIN-YIELD ; INTERSPECIFIC COMPETITION ; RADIATION INTERCEPTION ; MAIZE ; CROP ; WHEAT ; MANAGEMENT ; STRATEGIES ; WATER
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373883
作者单位	[Xu, Ke; Chai, Qiang; Hu, Falong; Fan, Zhilong; Yin, Wen] Gansu Agr Univ, Coll Agron, Lanzhou 730070, Peoples R China; [Xu, Ke; Chai, Qiang; Hu, Falong; Fan, Zhilong; Yin, Wen] Gansu Agr Univ, State Key Lab Aridland Crop Sci, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Xu, Ke,Chai, Qiang,Hu, Falong,et al. N-fertilizer postponing application improves dry matter translocation and increases system productivity of wheat/maize intercropping[J],2021,11(1).
APA	Xu, Ke,Chai, Qiang,Hu, Falong,Fan, Zhilong,&Yin, Wen.(2021).N-fertilizer postponing application improves dry matter translocation and increases system productivity of wheat/maize intercropping.SCIENTIFIC REPORTS,11(1).
MLA	Xu, Ke,et al."N-fertilizer postponing application improves dry matter translocation and increases system productivity of wheat/maize intercropping".SCIENTIFIC REPORTS 11.1(2021).