CAJ | 학술논문

通过设置N0(不施氮)、 N1(150 kg/hm2)、 N2(300 kg/hm2)和N3(450 kg/hm2)4个氮水平的田间小区试验,利用反射仪法对加工番茄新功能叶的叶柄进行硝酸盐测定,并测定地上部分生物量与经济产量,研究叶柄硝酸盐浓度与产量、叶全氮量、植株全氮量、地上部分干物质量等的相关性,建立加工番茄叶柄硝酸盐诊断追肥模型.结果表明,优化施氮处理( N2)经济产量为95259 kg/hm2,较不施氮处理( N0)增产50812 kg/hm2,增收14988元/hm2.各处理加工番茄叶柄硝酸盐浓度随生育期进展呈一致的变化趋势,且叶柄硝酸盐含量在一定范围内随施氮量的增加而增大.加工番茄不同生育时期叶柄硝酸盐浓度与产量均呈显著相关性.经过校检,加工番茄以盛果前期为氮营养诊断时期较为合理,其临界值为4182 mg/L.同时,初步建立了植株硝酸盐诊断追肥模型.
통과설치N0(불시담)、 N1(150 kg/hm2)、 N2(300 kg/hm2)화N3(450 kg/hm2)4개담수평적전간소구시험,이용반사의법대가공번가신공능협적협병진행초산염측정,병측정지상부분생물량여경제산량,연구협병초산염농도여산량、협전담량、식주전담량、지상부분간물질량등적상관성,건립가공번가협병초산염진단추비모형.결과표명,우화시담처리( N2)경제산량위95259 kg/hm2,교불시담처리( N0)증산50812 kg/hm2,증수14988원/hm2.각처리가공번가협병초산염농도수생육기진전정일치적변화추세,차협병초산염함량재일정범위내수시담량적증가이증대.가공번가불동생육시기협병초산염농도여산량균정현저상관성.경과교검,가공번가이성과전기위담영양진단시기교위합리,기림계치위4182 mg/L.동시,초보건립료식주초산염진단추비모형.
Field experiment with four levels of nitrogen i. e. N0 (no nitrogen), N1 (150 kg/hm2), N2 (300 kg/hm2) and N3 (450 kg/hm2 ) were set to explore the relationship between nitrate content in leaf petiole and yield, total N content in leaf, total N content in plant and aboveground biomass. Nitrate of new features leaf petiole was measured using reflectometry method and aboveground biomass and economic yield were also measured. The result showed that the optimized nitrogen application ( N2) economic output was 95 259 kg/hm2 , which was 50 812 kg/hm2 and 14 988 Yuan/hm2 higher than non-fertilized treat-ment (N0) in yield and income. Petiole nitrate concentration in all the treatments had the same trends along with the growing process, and the petiole nitrate content among treatments was N0﹤N1﹤N2, which showed it increased with the increasing a-mount of nitrogen fertilizer in a certain range. After proof testing, the pre-full fruit period of tomato was the reasonable period for nutrient diagnosis, and the diagnostic threshold was 4 182 mg/L. Meanwhile a topdressing model based on petiole nitrate content was established.