本文選題：采煤沉陷穩(wěn)沉區(qū)　切入點：低碳耕作　出處：《金屬礦山》2017年12期 　論文類型：期刊論文

【摘要】：利用山西省晉煤集團某煤礦沉陷坡面的作物產量和溫室氣體排放量田間觀測數據,對DNDC模型進行了驗證。采用驗證后的模型模擬了采煤沉陷坡面2.2°~25°下的玉米產量和單產增溫潛勢,分別選取2.2°、5°和12°這3個坡度,研究了不同坡度下不同耕作措施和施肥措施對玉米產量和單產增溫潛勢的影響,以此提出了兼顧作物產量和溫室氣體排放量的農田管理調控措施。結果表明:(1)當沉陷坡面坡度大于12°時,坡面作物產量下降迅速,且單產增溫潛勢急劇上升,因此,本研究提出應將采煤沉陷坡度控制在12°以內,以減小采煤沉陷坡面對產量和溫室氣體排放的影響;(2)綜合考慮產量和單產增溫潛勢,提出了適合采煤沉陷坡面的低碳高產的農田優(yōu)化管理措施,即將常規(guī)氮肥施肥量提高到306 kg/hm2,耕作深度由原來的耕深20 cm提高為30 cm,秸稈全部還田。
[Abstract]:Based on the field observation data of crop yield and greenhouse gas emission from a coal mine subsidence slope in Shanxi Jinmei Group, The DNDC model was used to simulate the maize yield and the potential of increasing temperature per unit yield at 2.2 擄or 25 擄of mining subsidence slope, and the three slopes of 2.2 擄5 擄and 12 擄were selected, respectively. The effects of different tillage and fertilization measures on maize yield and temperature potential per yield under different slopes were studied. The results show that when the slope of subsidence slope is greater than 12 擄, the crop yield on the slope decreases rapidly and the potential of increasing temperature per unit yield increases sharply. Therefore, when the slope of subsidence slope is greater than 12 擄, the yield of crop on the slope will decrease rapidly, and the potential of increasing temperature per unit yield will rise sharply. In this study, the slope of coal mining subsidence should be controlled within 12 擄to reduce the influence of mining subsidence slope on yield and greenhouse gas emission. The optimal management measures of low carbon and high yield farmland suitable for coal mining subsidence slope were put forward, that is, the amount of conventional nitrogen fertilizer was increased to 306 kg 路hm ~ (2), the tillage depth was increased from 20 cm to 30 cm, and the straw was returned to the field.
【作者單位】： 山西農業(yè)大學資源環(huán)境學院;
【基金】：國家自然科學青年基金項目(編號:51304130) 山西省青年科技研究基金項目(編號:2015021125) 國家自然科學基金項目(編號:51074154/E042203) 山西農業(yè)大學基金項目(編號:20132-13)
【分類號】：S513;TD82

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1 王寧;攀枝花煤業(yè)集團低碳產業(yè)發(fā)展戰(zhàn)略研究[D];四川師范大學;2017年

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本文編號：1639669