Effects of Different Vermicompost Levels on The Growth, Yield of ĐTL2 Rice Variety in Spring Season at Gia Lam, Ha Noi

  • Nguyễn Thị Ngọc Dinh
  • Phạm Tiến Dũng
  • Nguyễn Ích Tân
  • Nguyễn Hồng Hạnh
  • Phan Thị Thủy

Abstract

     The experiment was conducted to invetsigate the effect different vermicompost levels on growth and yield of ĐTL2 rice variety grown in 2013 and 2014 spring seasons at Vietnam National University of Agriculture (5, 10, 15, and 20 tons/ha in 2013 spring season and 5, 10, 15, 20 and 25 tons/ha in 2014 spring season). The experiment was arranged in a randomized complete block design (RCBD) with three replications. No significant differences in agronomic characteristics such as growth duration, number of leaves per main stem and effective number of tillers per hill were found with increased levels of vermicompost dose. However, increasing levels of vermicompost exerted positive effect on physiological characteristics as SPAD index, leaf area and dry matter. Significant yield increase was observed at 10 tons per hectare beyond which yield increment was insignificant. Highest net income (VND 27,596,000 per hectare) was obtained in 2014 cropping season with 10 tons vermicompost per hectare. The yield of ĐTL 2 rice variety depends on vermicompost dose expressed in the following regression, y = -0.075x2 + 2.472x + 41.01 with R² = 0.522 and optimal vermicompost dose was estimated at 16,4 tons per hectare.

điểm /   đánh giá
Published
2017-10-17
Section
AGRONOMY