Ảnh hưởng của ba khoảng cách hàng trên các đặc tính nông học và năng suất của năm giống đậu nành [Glycine max (L.) Merr.] vụ Xuân Hè 2015 tại tỉnh Vĩnh Long

Abstract

Soybean [Glycine max (L.) Merr.] yield is responsive to chang­es in plant population and row spacing. The objective of this study was to compare some agronomic traits and yield of soybean varieties cul­tivated in three different row spaces in a field of Tra On district, Vinh Long province. The experimental design was a split-plot arrangement of treatments in a randomized complete block, with three replications. Main plot factor was inter-row spacing of 30, 40, and 50 cm, and the sub-plot factor was soybean cultivars (MTĐ 176, MTĐ 517-8, MTĐ 760-4, MTĐ 860-3 and MTĐ 878-2); the spacing between plants (intra-row spacing) was 15 cm. The results showed significant differences among tested five cultivars of soybeans for all of data collected. The MTĐ 517-8 and MTĐ 878-2 cultivars had the greatest number of branches, number of pods per plant, number of seeds per plant resulted in the highest grain yield of 2.95 tons ha-1 and 2.73 tons ha-1, respectively. While row spacing effects were significant on the plant height, the height of the lowest pod, number of branches, number of seed per pod, and grain yield. Number of branches were greatest in the 50 cm row space. However, the plant height and the grain yield were highest in the 30 cm row space, 45.2 cm và 3.17 tons ha-1, respectively, while grain yield in two remaining row spaces were not differed significantly. Among the tested five soybean varieties, therefore, MTĐ 517-8 or MTĐ 878-2 would give the highest grain yield to soybean farmers in this region and the probability of obtaining maximum yields with narrow row space (30 cm).