DOI QR코드

DOI QR Code

Dry Matter, Nitrogen Content, Chlorophyll and Yield Maps of Rice by Different Rates of Nitrogen Application and Their Correlations

질소 시비량에 따른 벼의 건물중, 질소 함량, 엽록소, 수확량 변이 지도 및 이들의 상관 관계에 관한 연구


Abstract

This study was intended to investigate the temporal and spatial variabilities of dry matter, nitrogen content, chlorophyll of paddy rice and yield caused by different rates of nitrogen application. An experimental field was divided into 45 plots of 3.48 ${\times}$ 12 m in size and application rate of nitrogen varied from 0 to 235% with an increment of 25% based on the standard rate of N-P$_2$O$_{5}$-K$_2$O=12-8-8 kg/10a. The measurements were made 8 times every 9-10 days after the transplanting. About 60 days after the transplanting, there exhibited little variabilities in the dry matter caused by different rates of nitrogen application. After that. however, there showed large variabilities and the dry matter increased with the application rate. The nitrogen content of paddy also increased with the application rate but it was inconsistent. After the tillering period, the nitrogen content remained constant. In the early stage of the tillering period the nitrogen content decreased in spite of increase in the dry matter. However. after a certain period of time it increased with the dry matter. There were little variabilities of chlorophyll after the transplanting. However, the SPAD increased with application rate of nitrogen as the paddy grew. After the tillering period SPAD was not affected by the different rates. More yield was obtained at the plots where larger nitrogen content was measured.d.

Keywords

References

  1. 서울대학교 대학원 석사학위 논문 벼 한계 질소 농도 구명 및 군락 반사율에 의한 질소 영양 상태 추정 연구 김준환
  2. National Agricluture Mechanization Research Institute. Understanding field variability for precision farming. Proceedings of the international Seminar on Agricultural Machinery Technology for Precision Farming Blackmore,S.
  3. Environmental Systems Research Institute, Inc. Arcview dialog designer. ArcView GIS Version 3.1 ESRI.
  4. National Agricluture Mechanization Research Institute. Engineering technologies for precision farming. Proceedings of the International Seminar on Agriultural Machinery Technology for Precision Farming Sudduth,K.A.

Cited by

  1. Bush Growth and Fruit Quality of ‘Duke’ Blueberry Influenced by Nutritional Composition in Unheated Plastic House vol.27, pp.4, 2018, https://doi.org/10.12791/KSBEC.2018.27.4.319