CAJ | 학술논문

以精确施氮试验为基础,通过对产量、土壤供氮量、氮肥利用率、作物需氮量等指标进行分析,提出不同类型土壤目标产量氮肥用量。结果表明,精确施氮处理与常规施氮处理相比,小麦产量提高6.2%～7.6%,效益增加60.6～71.8元/667m2。水稻土、沿江潮土、沿海潮土土壤供氮量分别为6.37、5.57、6.02 kg/667m2。在300～500kg/667m2产量条件下,小麦百kg籽粒吸氮量、氮肥利用率均与产量呈线性正相关。目标产量400、425、450、475kg/667m2时,所需施氮量分别在9.0～14.0、11.5～16.1、13.8～18.1、15.9～19.9kg/667m2。
이정학시담시험위기출,통과대산량、토양공담량、담비이용솔、작물수담량등지표진행분석,제출불동류형토양목표산량담비용량。결과표명,정학시담처리여상규시담처리상비,소맥산량제고6.2%～7.6%,효익증가60.6～71.8원/667m2。수도토、연강조토、연해조토토양공담량분별위6.37、5.57、6.02 kg/667m2。재300～500kg/667m2산량조건하,소맥백kg자립흡담량、담비이용솔균여산량정선성정상관。목표산량400、425、450、475kg/667m2시,소수시담량분별재9.0～14.0、11.5～16.1、13.8～18.1、15.9～19.9kg/667m2。
Based on the experiment of precision nitrogen application, nitrogen requirement amount for target yields in the different soil were studied through analyzing on soil nitrogen supply, nitrogen use efficiency and nitrogen requirement. The results showed that application of precision nitrogen had a yield 6.2% ~ 7.6% and benefit 60.6 ~ 71.8 yuan/667m2 higher, compared with the conventional nitrogen fertilizer treatment. Nitrogen supply in paddy soil, fluvio-aquic soil along the costal area and fluvio-aquic soil along the Yangtze river were respectively 6.37,5.57, 6.02kg/667m2o During the yield range of 300-500kg/667m2, the N absorption amounts per 100kg grains of wheat, nitrogen use efficiency was the linear positive correlation with yield. When target yield was 400,425,450,475kg/667m2, nitrogen requirement amount were 9.0 ~ 14.0,11.5 - 16.1,13.8 - 18.1,15.9 ~ 19.9kg/667m2, respectivelyo