CAJ | 학술논문

研究了赣东北地区11个试验地土壤有机质的变化，及其与产量和肥料利用率的相互关系。结果表明：该地区的水稻土有机质普遍偏低，其中土壤有机质30 g／kg以下的比例达62．7％。土壤有机质与CK、OPT处理的水稻产量相关性不显著，这可能与土壤性质有关。然而，水稻土的有机质含量与缺磷处理的水稻产量呈显著正相关，但与缺钾处理的产量则相关性不显著，表明土壤磷素是限制赣东北地区水稻产量的关键因子，因此，在有机质含量较低的水稻土上，增施磷肥是提高水稻产量的重要措施。土壤有机质含量与磷肥农学效益呈显著负相关，这说明在土壤有机质含量较低时，磷肥的施用对水稻的产量具有重要作用，而随着土壤有机质的提高，磷肥的利用效益呈逐渐下降的趋势。因此，在赣东北地区，磷肥的施用量应根据土壤有机质含量高低而做适当调整。
연구료공동북지구11개시험지토양유궤질적변화，급기여산량화비료이용솔적상호관계。결과표명：해지구적수도토유궤질보편편저，기중토양유궤질30 g／kg이하적비례체62．7％。토양유궤질여CK、OPT처리적수도산량상관성불현저，저가능여토양성질유관。연이，수도토적유궤질함량여결린처리적수도산량정현저정상관，단여결갑처리적산량칙상관성불현저，표명토양린소시한제공동북지구수도산량적관건인자，인차，재유궤질함량교저적수도토상，증시린비시제고수도산량적중요조시。토양유궤질함량여린비농학효익정현저부상관，저설명재토양유궤질함량교저시，린비적시용대수도적산량구유중요작용，이수착토양유궤질적제고，린비적이용효익정축점하강적추세。인차，재공동북지구，린비적시용량응근거토양유궤질함량고저이주괄당조정。
We studied the change in paddy soil organic matter content and its relations with rice grain yield and fertilizer use ef-ficiency in 11 experimental fields of northeastern Jiangxi.The results showed that the organic matter content in paddy soil in this area was generally low, and there were 62.7%fields whose soil organic matter content was less than 30 g/kg.In CK and OPT treatments, there was no significant correlation between soil organic matter content and rice grain yield.However, there was a significantly posi-tive correlation between soil organic matter content and rice grain yield in OPT-P treatment, but this correlation was not significant in OPT-K treatment.Thus, increasing the application rate of phosphate fertilizer is an important measure to increase the grain yield of rice in paddy soil with lower organic matter content.The soil organic matter content was significantly negatively correlated with the agronomic efficiency of phosphorus fertilizer, indicating that the application of phosphorus fertilizer plays an important role in rice yield improvement when the soil organic matter content was relatively low.But phosphorus fertilizer use efficiency declined gradually with the improvement of soil organic matter content.Therefore, in the northeast area of Jiangxi province, the application rate of phos-phorus fertilizer should be properly adjusted based on the soil organic matter content.