長(zhǎng)期試驗(yàn)條件下褐土地力貢獻(xiàn)率的演變特征及其影響因素分析
[Abstract]:Cinnamon soil is one of the main soil types in wheat and maize producing areas in China. The contribution rate of soil fertility significantly affects crop yield. In order to find out the evolution characteristics of soil fertility contribution rate in cinnamon soil in China, and to guide soil management and fertilization scientifically and reasonably, this paper analyzed the evolution characteristics of wheat and maize contribution rate in cinnamon soil under the condition of long-term fertilization for 25 years (1988-2013). The results showed that the soil fertility contribution rates of wheat and maize yield were 51.6% and 54.5% respectively in the cinnamon soil area, and the yield rate was 51.6% and 54.5% respectively in the cinnamon soil area, and the maize cinnamon soil was cooked once a year in the northeast of China. The cultivated land fertility decreased gradually, after about 9 years and 6 years, it was stable at about 40% and 60%, and the cultivated land fertility decreased gradually in North China. After about 10 years of decline, it was basically stable at about 12 0% and 44%. Path analysis further proved that the contribution rate of soil available phosphorus, available potassium and soil organic matter to maize field was the largest, and the contribution rate of soil available phosphorus was the highest, which indicated that soil available phosphorus. Available potassium and soil organic matter are the main influencing factors of basic soil fertility in cinnamon soil area and the main evaluation index of soil fertility in cinnamon soil area.
【作者單位】: 中國(guó)農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所;全國(guó)農(nóng)技推廣中心;
【分類號(hào)】:S158
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