Influence of Different Irrigation Patterns on the Distribution of Soil Moisture and Nitrate

A two-year micro-field trials was carried out to determine the influences of traditional furrow irrigation and alternate furrow irrigation with fertilization and irrigation in different rows on the distribution of soil moisture and nitrate.Results showed that the distribution of soil moisture and nitrate were affected by irrigation patterns,water amount and frequency of irrigation.Regardless the amount of irrigation,there was differences between fertilization furrow and irrigation furrow in soil moisture content and soil nitrate content on the profile of 0~60 cm after the first irrigation.The differences in soil moisture decreased and in soil nitrate increased with the amount of irrigation increase after the second irrigation.While the nitrate content of surface and subsurface layer increased with the amount of irrigation increase.Given decreasing the water and nitrate deep percolation and increasing the availability of fertilizer,the amount of irrigation should be in the range of 450~600 m3/hm2.