基于主成分分析法的沙灣縣農(nóng)田土壤肥力評(píng)價(jià)
[Abstract]:The understanding of soil fertility and its spatial distribution is the premise of rational use of land and improvement and fertilization of soil. The pH value, salt content, organic matter, total amount of nitrogen, phosphorus and potassium and available amount of soil in surface soil (0~20cm) were measured, and the soil fertility index was calculated by principal component analysis (PCA). The spatial distribution of soil nutrient and soil fertility index was fitted by Kriging interpolation. The results showed that the contents of pH, salt, organic matter, total nitrogen, alkali-hydrolyzed nitrogen, total phosphorus, available phosphorus, total potassium and available potassium in the farmland soil of Shawan County varied in the range of 7.43 ~ 9.22 ~ 0.844 ~ 3.91 g / kg ~ 0.141.98 g 路kg ~ (-1) 路kg ~ (-1) ~ (-1), respectively. 0.10 / 2.28g / kg / kg 177mg / kg / kg 1.30g / kg / kg 0.10g / kg 18.51g / kg 42mg / kg + 269mg / kg; The soil quality index is 0.10 ~ 0.51, and the soil fertility level is on the low side. The pH value of farmland soil in Shawan County increased gradually from northwest to southeast, organic matter and total nitrogen gradually increased from southwest to northeast, the available phosphorus of soil was mainly concentrated in the central part of the soil, and the content of alkaline hydrolyzed nitrogen was the highest in the middle and north of the soil. The soil fertility index decreased from southwest to northeast, and the principal component analysis showed that the main factors causing soil fertility change in Shawan County were organic matter and pH value. The soil fertility level in Shawan County was generally low, so the improvement and fertilization should pay more attention to the increase of soil organic matter content.
【作者單位】: 新疆農(nóng)業(yè)大學(xué)草業(yè)與環(huán)境科學(xué)學(xué)院;新疆土壤與植物生態(tài)過程實(shí)驗(yàn)室;新疆慧爾農(nóng)業(yè)集團(tuán)股份有限公司;新疆沙灣縣農(nóng)業(yè)技術(shù)推廣中心;
【基金】:新疆維吾爾自治區(qū)自然科學(xué)基金項(xiàng)目(2017D01A37)
【分類號(hào)】:S158
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