Application of Water Conservation of Water Repellent Soil in Agriculture

The sand was added with octylamine to make it water repellent, and pepper was planted in the same natural environment by three groups: covering water repellent soil, film mulching, and non-film mulching． Cumulative watering amount, plant height, diameter, and quality of pepper at the same time were compared and analyzed． At the same time, the Weiner quadrupole method was used to compare soil resistivity． Results showed that in the early growth period of pepper, amount of pepper watering in the area covered with water repellent soil was the least, and yield of pepper in the same period was slightly less than that in area covered with film and far more than that in area not covered with film, plant height was lower, and diameter was the least． Soil resistivity of covered water repellent soil area before and after rainfall was smaller than that of natural soil area． And variation range of resistivity value of covered water repellent soil area was smaller than that of natural soil area． Results showed that repulsion of water repellent soil could reduce rate of water movement in natural soil, reduce water evaporation of field, and benefit growth of crops． The trial aimed to provide new water conservation measures for dry areas without affecting crop growth．