Effect of Adding SAPs Polymers and Spraying With Organic Fertilizer on The Vegetative and Root Growth Characteristics of Lawns

Abstract

The experiment was carried out in the fields of the Department of Horticulture and Landscaping, College of Agriculture - Anbar University for the period from 1/4/2020 to 31/1/2021 to experience the effectiveness of adding SAPs, spraying with organic fertilizers and the interaction between them in the vegetative and root growth characteristics of the lawn. The polymers were used in three concentrations (0, 20, 40) g kg-1 soil, while the organic fertilizer was in four concentrations (0, 0.5, 1, 1.5) ml.L-1. A factorial experiment was carried out according to a randomized complete block design (RCBD) with three replications. The results showed that the addition of polymers at the level of 40 g kg-1 soil had significant differences in the average plant density, root length, dry matter percentage and chlorophyll content in the vegetative group was 47.83 plant 100 cm-2, 25.20 cm, 36.85% and 89.36 mg g-1 for hot season and 29.17%, 36.19 m mg-1 for cold season. The high concentration of organic fertilizer 1.5 ml L-1 showed significant differences in plant density, number of branches in the crown area, root length, dry matter percentage and chlorophyll content in the vegetative group was 46.00 plant 100 cm-2, 9.10 branch plant-1, 25.14 cm and 36.41%, 87.80 mg g-1 for hot season and 29.04%, 33.99 mg g-1 for cold season. The interaction treatment between the level of application of polymers 40 g kg-1 soil and the treatment of adding organic fertilizer 1.5 ml L-1 showed significant differences in the number of branches, root length, dry matter percentage and chlorophyll content in the vegetative group was 9.83 branch plant-1, 27.36 cm and 39.65%, 99.31 mg g-1 for hot season and 33.44%, 42.10 mg g-1 for cold season.