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首页> 外文期刊>Australian Journal of Crop Science >Short-term effects of liming on chemical attributes of tropical sandy soil and soybean (Glycine max L.) yield
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Short-term effects of liming on chemical attributes of tropical sandy soil and soybean (Glycine max L.) yield

机译：石灰对热带沙质土壤和大豆（Glycine max L.）产量化学特性的短期影响

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Lime application is the most appropriate technique to raise soil pH, decrease Al3+ toxicity and increase Ca2+ and Mg2+ contents in acidic tropical and subtropical moist soils. The objective of this research is to evaluate changes in chemical attributes and soybean yield in sandy soil after lime incorporation. The soil was classified as a typical Quartzipsamments cultivated with (Brachiaria decumbens Stapf) pasture, and its degradation state was classified as strong. The experimental design was a randomized block with six replicates and four lime doses (0, 2, 4 and 8 Mg ha-1). The soil in the area was prepared with one plowing and two harrowings, followed by lime application and two more harrowings to incorporate the lime up to 0.2 m depth. The dependent variables analyzed were soybean yield; numbers of pods filled, pods not filled, and total pods and soil pH in water, CaCl2 and KCl. All parameters were measured at depth of 0.0-0.1, 0.1-0.2 and 0.2-0.3 m. The increase of soil pH by the different lime rates were observed just in 0.0-0.1 and 0.1-0.2 m layers. After 6 months no changes in soil pH were observed in subsoil (0.2-0.3 m). With lower H+ and Al3+ activity and higher basic cation availability, soybean yield was also changed. The maximum soybean yield of 2,929 kg ha-1 was observed with 4.6 Mg ha-1 lime application, although pod number per plant remained constant, independent of limestone dose.
机译：在酸性热带和亚热带湿润土壤中，石灰施用是提高土壤pH值，降低Al3 +毒性以及增加Ca2 +和Mg2 +含量的最合适技术。这项研究的目的是评估石灰掺入后沙质土壤中化学特性和大豆产量的变化。土壤被归类为（Brachiaria decumbens Stapf）牧场种植的典型Quartzipsamments，其降解状态被归类为强。实验设计是一个随机区组，具有六个重复样本和四个石灰剂量（0、2、4和8 Mg ha-1）。用一耕和两耙来准备该地区的土壤，然后施用石灰，再进行两次耙以掺入深度达0.2 m的石灰。分析的因变量是大豆产量。填充的豆荚数量，未填充的豆荚数量以及水，CaCl2和KCl中的总豆荚和土壤pH值。所有参数均在0.0-0.1、0.1-0.2和0.2-0.3 m的深度处测量。仅在0.0-0.1和0.1-0.2 m的层中观察到了不同pH值下土壤pH的增加。 6个月后，在底土（0.2-0.3 m）中未观察到土壤pH的变化。由于H +和Al3 +的活性较低，碱性阳离子的利用率较高，大豆的产量也发生了变化。施用4.6 Mg ha-1石灰可观察到大豆最大产量为2929 kg ha-1，尽管每株豆荚的数量保持恒定，与石灰石剂量无关。

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