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首页> 外文期刊>Chilean Journal of Agricultural Research >Nitrogen mineralization and released nutrients in a volcanic soil amended with poultry litter
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Nitrogen mineralization and released nutrients in a volcanic soil amended with poultry litter

机译：用家禽垫料改良的火山土壤中的氮矿化和释放的养分

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Optimum application rates of poultry litter (PL) spread out on the farmer′s field is a valuable source of available plant nutrients. The aim of this study was to compare the effect of two rates of PL and conventional fertilization (CF) on N mineralization and P, K, Zn, and Cu availability in an Andisol from Southern Chile under controlled conditions. Aerobic incubation was carried out for a 16-wk period. N mineralization rates were higher (61.5%) with the two PL treatments than with conventional fertilizer (23%). CF was associated with high N availability prior to the start of incubation and slight immobilization during the first week, perhaps due to a more rapid conversion of urea into NH4 which was then temporarily immobilized by the microbial biomass. At the start and end of the incubation period, Olsen-extractable P content was generally higher in CF. Due to the high fixation capacity of the soil studied, extractable P values were slightly increased suggesting that PL mineralization is only associated with a low risk of P contamination in volcanic soil. In PL, K, Zn, and Cu availability were higher than in CF. However, values obtained for Cu and Zn were average in relation to referential values used in agricultural soil. The results indicated that PL could be an alternative to conventional fertilizer under the conditions of the present study.
机译：散布在农民田间的家禽垫料（PL）的最佳施用量是可获得的植物营养素的宝贵来源。这项研究的目的是在受控条件下比较智利南部安第索尔的PL和常规施肥（CF）两种速率对N矿化以及P，K，Zn和Cu有效性的影响。有氧培养进行16周。两种PL处理的氮矿化率（61.5％）高于传统肥料（23％）。 CF与培养开始前的高氮利用率和第一周的轻微固定化有关，这可能是由于尿素更快地转化为NH 4 所致，然后被微生物生物量暂时固定了。在潜伏期的开始和结束时，CF中Olsen可萃取的P含量通常较高。由于研究的土壤具有较高的固定能力，可提取的P值略有增加，表明PL矿化仅与火山土壤中P污染的风险低有关。在PL中，K，Zn和Cu的可用性高于CF。但是，相对于农业土壤中使用的参考值，获得的Cu和Zn值是平均值。结果表明，在本研究条件下，PL可以替代常规肥料。

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