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在桶栽条件下,利用~(15)N示踪技术,选用20个基因型花生为供试材料,研究了高肥力土壤条件下不同基因型花生对氮素利用的差异.结果表明:高肥力土壤条件下花生氮素营养以土壤氮为主,根瘤固氮次之,肥料氮最低.不同基因型间花生对全氮、肥料氮、土壤氮和根瘤固氮的吸收和积累均存在显著差异,基因型间遗传变异以根瘤固氮最大,肥料氮和土壤氮相当.氮素荚果生产效率和氮肥利用率基因型间差异显著,最高值分别为最低值的3.6和2.1倍.全氮、肥料氮、土壤氮和根瘤固氮的氮素收获指数基因型间均存在显著遗传变异,且以根瘤固氮的氮素收获指数基因型间遗传变异最大.花生荚果产量与不同氮源氮素积累量及氮素收获指数、氮素荚果生产效率和氮肥利用率呈显著或极显著正相关.依据花生对不同氮源氮素吸收积累和荚果产量筛选出全氮高积累高产型、肥料氮高积累高产型、土壤氮高积累高产型和根瘤固氮高积累高产型四大类型花生,其中四大类型特征兼有的有4个花生基因型.
Under the condition of barley planting, the use of ~ (15) N tracing technique and the selection of 20 genotypes of peanut as experimental materials, the differences of nitrogen utilization of different genotype peanut in high-fertility soil were studied.The results showed that high fertility Under soil conditions, the nitrogen nutrition of peanut was mainly soil nitrogen, followed by the nitrogen fixation of the nodules and lowest of the fertilizer nitrogen.The differences of absorption and accumulation of nitrogen, nitrogen, nitrogen and nitrogen fixation in different genotypes of peanut were significant Among the genetic variation, the nitrogen fixation was the largest in the nodule, and the fertilizer nitrogen was similar to the soil nitrogen. There was significant difference between the nitrogen pod production efficiency and the nitrogen use efficiency genotype, with the highest value being 3.6 and 2.1 times the lowest, respectively. And nitrogen fixation index of root nodule had significant genetic variation, and the genetic variation among the nitrogen-harvested index genotypes with nitrogen fixation of nodules was the highest.The yield of peanut pod and nitrogen accumulation of different nitrogen sources and nitrogen harvest index, Nitrogen pod production efficiency and nitrogen use efficiency were significantly or very significantly positive correlation.According to the peanut nitrogen absorption and accumulation of different nitrogen sources and pod yield screening of high total nitrogen accumulation and high yield, Tired high-yielding, high accumulation of soil nitrogen and High Yield High Yield nitrogenase high accumulation peanut four types, four types of which have features of both genotypes 4 peanuts.