CAJ | 학술논문

为研究作物地上部分氨排放以及对大气氮沉淀的吸收情况,以水稻(Oryza saliva L.)品种武运粳7号和小麦(Triticumaestivum L.)品种扬麦15为例.在盆栽条件下,利用~15N同位素示踪技术,采用探索性的研究方法,初步分析了水稻成熟期植株NH_3排放和小麦植株直接吸收的大气沉降氮.结果表明,土培的水稻品种武运粳7号地上部植株成熟期排放氨氮(NH_3-N)量约占当季总施氮(N)量的(0.50±0.21)%;收获后水稻植株不同部位~(15)N丰度值以根部最高,茎叶次之,籽粒最低,这与植株体内养分的运移顺序变化一致;贫化~(15)N小麦砂培试验测定的包括植株直接吸收在内的大气氮沉降数量为N(14.8±4.3)kg·hm~(-2),低于国外类似方法以其它作物作为研究对象的测定结果.
위연구작물지상부분안배방이급대대기담침정적흡수정황,이수도(Oryza saliva L.)품충무운갱7호화소맥(Triticumaestivum L.)품충양맥15위례.재분재조건하,이용~15N동위소시종기술,채용탐색성적연구방법,초보분석료수도성숙기식주NH_3배방화소맥식주직접흡수적대기침강담.결과표명,토배적수도품충무운갱7호지상부식주성숙기배방안담(NH_3-N)량약점당계총시담(N)량적(0.50±0.21)%;수획후수도식주불동부위~(15)N봉도치이근부최고,경협차지,자립최저,저여식주체내양분적운이순서변화일치;빈화~(15)N소맥사배시험측정적포괄식주직접흡수재내적대기담침강수량위N(14.8±4.3)kg·hm~(-2),저우국외유사방법이기타작물작위연구대상적측정결과.
In total, a rice (Oryza sativa L.) cultivar Wuyunjing 7 and a common wheat(Triticum aestivum L.) cultivar Yangmai 15 were used to evaluate ammonia emission from rice shoots and uptake of atmospheric nitrogen deposition in wheat plants in pot ex-periment by the techniques of ~(15)N isotope tracer and method of exploratory anylysis. Results showed that the amount of ammonia (NH_3) emission from shoot parts of rice accounted for approximate (0.50±0.21)% of fertilizer N application in the whole growth period, based on soil culture experiment. After harvesting of Wuyunjing 7, ~(15)N content of its grain, stem, leave and root were incus-tired, respectively, and root presented the highest ~(15)N content while grain presented the lowest ~(15)N content among them, which is consistent with the order of nutrient transportation from root to grain. Based on sand culture in pot experiment with depleted ~(15)N, the amount of uptake of atmospheric N deposition including direct uptake by wheat plant reached (14.8±4.3)kg·hm~(-2), which was slightly lower than previous reports with similar methods but different plant species.