Chuyển đổi chú giải bản đồ đất Đồng bằng sông Cửu Long phân loại theo hệ thống WRB 1998 sang WRB 2006

Minh, Võ Quang; Trí, Lê Quang; Vũ, Phạm Thanh; Dũng, Trần Văn

doi:10.22144/ctu.jsi.2016.098

Cited by 1 publication

(2 citation statements)

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“…The soil texture at the experimental site is clay loam. According to the WRB, the soil is classified as a mollic Gleysol, which matches the surrounding regional soil profile (Minh et al, 2016). In both years, the pH (H 2 O) of the water on the field was 5.2, with an EC of 0.4 mS cm −1 .…”

Section: Methodsmentioning

confidence: 99%

“…Rice production in the VMD is a patchwork of smallholder triple‐ and double‐cropping systems (Kontgis et al, 2015; Son et al, 2013; Vu et al, 2022). Triple cropping is found in alluvial soils (Minh et al, 2016) near freshwater canals in the upper VMD (Vu et al, 2022). It is more productive though less sustainable, as continuous year‐round cultivation requires increased fertilizer and pesticide use (Tran et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Genotypic responses of rice to alternate wetting and drying irrigation in the Mekong Delta

Johnson

Nha³

et al. 2023

J Agronomy Crop Science

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In the Vietnamese Mekong Delta (VMD), alternate wetting and drying (AWD) in rice (Oryza sativa L.) production during the dry season has the potential to reduce greenhouse gas emission and freshwater use. However, its effect on yield compared with continuously flooded systems can vary. To evaluate the effect of AWD on yield and yield‐forming processes on genotypes commonly grown in the VMD, field trials over two consecutive dry seasons were conducted at the Loc Troi Group's agricultural research station in the VMD. We observed a significant yield reduction, 7% on average, across all varieties grown under AWD. Analysis of yield components showed that under AWD, genotypes on average produced more tillers, but fewer spikelets, suffered greater spikelet sterility and had a lower 1000 grain weight. The size of this effect differed between dry seasons. Accordingly, we were able to identify and characterize genotypes better suited to AWD. We also could relate shifts in sink‐source relationships to the overlap of drying events and key phenological stages other than flowering. Our study shows how successful implementation of AWD requires adaptation to both environment and genotype.

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Section: Methodsmentioning

confidence: 99%