Effects of organic fertilizer applied using the estimated mineralizable nitrogen method on nitrogen uptake, growth characteristics, yield, and yield components of Genkitsukushi rice (Oryza sativa)

Kyi Moe, Aung Zaw Htwe, Doan Cong Dien, Yoshinori Kajihara, Takeo Yamakawa

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Abstract

The nitrogen (N) uptake, growth characteristics, and yield of the Genkitsukushi rice variety were evaluated over 2 years (2017 and 2018) of field experiments involving the application of poultry manure (PM), cow manure (CM), and compost (CP). Organic fertilizers were quantified as the estimated-mineralizable-nitrogen (EMN) based on the total N content. Compared with chemical fertilizer (CF100), CF50PM50 resulted in greater growth characters, N uptake, dry matter, and yield in both years. The PM (total N > 4%) had a higher N mineralization, a greater N availability to rice and thus, a greater contribution to yield. More N was available from CM and CP containing ∼2% of total N in the second year. In conclusion, an organic fertilizer with a higher total N (>4%) was compatible with the EMN method and let to increase N availability and yield of Genkitsukushi japonica rice.

Original languageEnglish
JournalJournal of Plant Nutrition
DOIs
Publication statusAccepted/In press - Jan 1 2020

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All Science Journal Classification (ASJC) codes

  • Physiology
  • Agronomy and Crop Science

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