Effect of Nitrogen Fertilization Rate and Seeding Rate on the Agronomic Characteristics and Yield of Whole-Crop-Barley in Newly Reclaimed Land
신간척지인 새만금간척지에서 청보리 생산성 증대를 위한 적정 질소시비량과 파종량을 검토한 결과를 요약하면 다음과 같다. 1. 출현율은 69 ~ 77%, 월동율은 60 ~ 65% 수준이었다. 2. 초장은 질소시비량이 증가할수록 길어졌으며, 파종량간에 는 차이가 없었다. 3. 당 경수는 질소시비량 250 kg/ha까지, 파종량 300 kg/ha까 지 증가하였다. 4. 포장도복은 질소시비량 300 kg/ha와 파종량 400 kg/ha에 서 경미하게 발생하였다. 5. 생체수량과 건물수량은 질소시비량 250 kg/ha까지, 파종 량 300 kg/ha까지 증가하였다. 6. 따라서 신간척지에서 청보리재배시 생산성 증대를 위한 적정 질소시비량은 250 kg/ha, 파종량은 300 kg/ha정도가 적당 할 것으로 생각된다.
In order to identify optimal nitrogen fertilization amounts and seeding rates when cultivating whole-crop-barley at Saemanguem Reclaimed Land which is a new reclaimed land, growth and development characteristics and yield potential were examined. Germination ratio was from 69 to 77% and wintering rates were from 60 to 65%. Plant lengths became longer as nitrogen fertilization amounts increased and there were no differences between seeding rates. Number of tiller per increased up to 250kg/ha of nitrogen fertilization amounts and 300kg/ha of seeding rates. Lodging slightly occurred at 300kg/ha of nitrogen fertilization amounts and 400kg/ha of seeding rates. Fresh weight yields and dry matter yields increased up to 250kg/ha of nitrogen fertilization amounts and 300kg/ha of seeding rates. Therefore, when the whole crop barley was cultivated at the reclaimed land, optimal nitrogen fertilization amounts and seeding rates were considered to be 250kg/ha and 300kg/ha respectively.