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Nutrient Leaching and Crop Uptake in Weighing Lysimeter Planted with Soybean as Affected by Water Management

중량식 라이시미터에서 콩 재배시 물관리 방법에 의한 양분의 용탈과 작물 흡수

  • Received : 2017.09.11
  • Accepted : 2017.09.25
  • Published : 2017.09.30

Abstract

BACKGROUND: Soil water content strongly depends on weather condition and irrigation, and it could influence on crop nutrient use efficiency. This study was performed to assess nutrient uptake of soybean by soil water condition. METHODS AND RESULTS: In this study, nutrient leaching and crop uptake as affacted by water management practice was investigated using weighing lysimeter which is located in National institute of agricultural science, Wanju, Jeonbuk province from June 2015 to October 2016. Water supply for soybean (cv. Daewon) was managed with irrigation and rainfall. Nitrate leaching was greatest in the rainfall treatment at early July 2016. Yield of soybean in the rainfall treatment was only 25% compared to the irrigation due to the drought at flowering and podding period. The uptake of nitrogen was considerably reduced by drought whereas the uptake of phosphorus and potassium was less affected by drought. CONCLUSION: It was proven that nitrogen loss and uptake were dependent on soil water condition. Therefore, irrigation water management to maintain available soil moisture capacity is critical to nitrogen uptake and yield of soybean.

Keywords

Irrigation;Nitrogen uptake;Soybean;Weighing lysimeter

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Acknowledgement

Grant : Research Program for Agricultural Science & Technology Development

Supported by : National Institute of Agricultural Sciences, Rural Development Administration