Abstract
Regulation effects of water and nitrogen on potato dry matter and nitrogen accumulation and partitioning
Highlights
Potato (Solanum tuberosum L.) is an important food crop that is grown in many regions throughout the world
To evaluate the effects of water and N level on dry matter (DM) and N accumulation and partitioning during the tuber bulking stage in the potato, a pot experiment was conducted with three water levels (90%, 70%, and 50% of field capacity) and three N levels (0, 85.5 and 171 kg N ha-1)
The results showed that potato tuber yield and tuber N uptake were significantly affected by the water levels, N levels, and the interaction between water and N
Summary
Potato (Solanum tuberosum L.) is an important food crop that is grown in many regions throughout the world. There is growing demand for potatoes for food, feed, and industrial products (Birch et al, 2012). Water is essential for plant growth and it dramatically affects potato growth and yield (Bélanger et al, 2001). The potato is sensitive to water stress, even slight water shortage can cause a reduction in tuber yield, especially during the tuber bulking stage (an Loon, 1981). Previous studies showed that water level significantly affects potato plant DM and N accumulation, while its effect on the partitioning of DM to tubers is conflicting: some studies reported that there was no significant difference in the partitioning of DM to tubers under different water levels whereas others put forth that water deficiency
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