本文選題：紅壤 + 菜地　； 參考：《土壤通報(bào)》2017年02期

【摘要】：中國南方紅壤區(qū)菜地普遍存在缺鎂現(xiàn)象,蔬菜生產(chǎn)上適量添施鎂肥具有重要的現(xiàn)實(shí)意義。目前有關(guān)蔬菜施用鎂肥的效應(yīng)研究報(bào)道尚不多,尤其是我國南方紅壤區(qū)菜地的相關(guān)研究則更少。采用田間小區(qū)試驗(yàn)方法,在農(nóng)戶常規(guī)施用化肥的基礎(chǔ)上,對(duì)紅壤菜地添施不同劑量的鎂肥,研究施鎂對(duì)蔬菜產(chǎn)量、營養(yǎng)元素吸收及菜地土壤基本肥力狀況的影響規(guī)律。結(jié)果表明:在常規(guī)化肥施用的基礎(chǔ)上,適量地添施鎂肥(施硫酸鎂112.5~450.0 kg hm~(-2)),小白菜增產(chǎn)幅度為12.4%~20.4%,氮、磷、鉀及鎂等營養(yǎng)元素的吸收量分別提高27.7%~42.5%、30.1%~84.9%、38.0%~80.3%和53.2%~131.9%,蔬菜收獲后土壤全鎂和交換性鎂含量分別提高15.8%~68.4%和29.0%~119.0%。小白菜產(chǎn)量與施鎂肥量可用一元二次方程y=-0.53x2+60.61x+9093(R2=0.961**)較好地線性擬合,由該方程可以得出,當(dāng)施硫酸鎂量為381.2 kg hm~(-2)時(shí),小白菜可獲得最高產(chǎn)量,即10825.8 kg hm~(-2)。
[Abstract]:There is a widespread lack of magnesium in vegetable plots in the red soil area of southern China. The application of magnesium fertilizer in vegetable production is of great practical significance. At present, there are few reports on the effect of magnesium fertilizer application in vegetables, especially in the southern red soil area of China. The effects of magnesium fertilizer on vegetable yield, nutrient absorption and soil basic fertility were studied on the red soil vegetable field. The results showed that on the basis of conventional fertilizer application, adding magnesium fertilizer (Magnesium Sulfate 112.5~450.0 kg Hm ~ (-2)) was 12.4%~20.4%, nitrogen, phosphorus and potassium. The absorption of nutrients such as magnesium and other nutrients increased by 27.7%~42.5%, 30.1%~84.9%, 38.0%~80.3% and 53.2%~131.9% respectively. The content of all magnesium and exchangeable magnesium in soil increased respectively after the harvest of vegetables, respectively, and the yield of 15.8%~68.4% and 29.0%~119.0%. small white cabbage could be fitted well by two times equation y=-0.53x2+ 60.61x+9093 (R2=0.961**). The equation can be concluded that when the amount of Magnesium Sulfate applied is 381.2 kg hm~ (-2), the highest yield of cabbage can be obtained, that is, 10825.8 kg hm~ (-2).
【作者單位】： 福建省農(nóng)業(yè)科學(xué)院土壤肥料研究所;
【基金】：國家科技支撐計(jì)劃項(xiàng)目(2015BAD05B01-05,2012BAD14B15-6) 福建省屬公益類基本科研專項(xiàng)(2014R1022-7)資助
【分類號(hào)】：S158;S634.3

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本文編號(hào)：2079729