Ảnh hưởng của mật độ và chế phẩm paclobutrazol trong sản xuất lạc ở Quảng Nam vụ đông xuân 2019 – 2020

Abstract

The study was carried out in the sandy loam soil at Dai Hoa commune, Dai Loc district, Quang Nam province, in the winter-spring season 2019 to 2020. Four densities plant including 26.700 plants; 33.300 plants; 40.000 plants and 50.000 plants/ha had applied  paclobutrazol 10% with dose 750 g/ha at the tip of the pegs putting into the soil (35 – 40 days after sowing). The data showed that the number of leaf/plant, number of first-class branch/plant in 4 treatments was nonsignificant different, but the main-stem height and the length of the first-class lengthiest branch was shortest in 50.000 plants/ha. The yield components were nonsignificant different, but due to high plant density, so that theory of yield, actual yield increased more than in order and had significant. The theory of yield from 8970 kg/ha to 11450 kg/ha and actual yield 4070 kg/ha to 4980 kg/ha and highest effect of economic in 40.000 plants and 50.000 plants/ha.