|Author:||Li, Ping ; Qi, XueBin ; Fan, XiangYang ; Wu, HaiQinq ; Qiao, DongMei ; Fan, Tao ; Zhao, ZhiJuan ; Huang, ZhongDong ; Zhu, DongHai|
|Book Group Author:||NA|
Alternate partial root-zone irrigation (APRI) has been established as an efficient technology to save water, but its effectiveness in saving nutrients and reducing the impact on soil and water environment was less understood. A field experiment was conducted in China to determine the effect of full irrigation and APRI on water and nitrogen use efficiency of potatoes. The irrigation amount of the whole growth stage of potato, residual nitrogen in plant, residual nitrogen in soil, water and nitrogen use efficiency with different treatments were analysed. Results showed that after the harvest, there were no significant differences on crop yield between APRI and full irrigation. However, the values of irrigation water use efficiency with APRI treatments were higher than that with full irrigation treatments (p=0.05). The residual nitrate nitrogen and mineral nitrogen of soil in different soil layers with full irrigation treatments were higher than those with APRI treatments. The values of nitrogen use efficiency in crop and farmland of APRI (I, K) were significantly higher than those of full irrigation (J, L) (p=0.05). Therefore, APRI treatments can not only improve the water use efficiency of the crop significantly, but also improves mineral nitrogen availability, which are beneficial to the crop's uptake and utilization of nitrogen from soil.
|Pages:||92 - 95|
|Journal:||Transactions of the Chinese Society of Agricultural Engineering|
irrigation, irrigation systems, nitrogen, nutrientavailability, nutrient uptake, plant water relations, potatoes, useefficiency, water use efficiency, China, Solanum tuberosum, East Asia,Asia, Developing Countries, Solanum, Solanaceae, Solanales,dicotyledons, angiosperms, Spermatophyta, plants, eukaryotes, watering,Field Crops (FF005) (New March 2000), Plant Nutrition (FF061), PlantWater Relations (FF062), Soil Water Management (Irrigation and Drainage)(JJ800) (Revised June 2002) [formerly Soil Water Management]