本文選題：采煤沉陷穩(wěn)沉區(qū)　切入點(diǎn)：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(tuán)某煤礦沉陷坡面的作物產(chǎn)量和溫室氣體排放量田間觀測(cè)數(shù)據(jù),對(duì)DNDC模型進(jìn)行了驗(yàn)證。采用驗(yàn)證后的模型模擬了采煤沉陷坡面2.2°~25°下的玉米產(chǎn)量和單產(chǎn)增溫潛勢(shì),分別選取2.2°、5°和12°這3個(gè)坡度,研究了不同坡度下不同耕作措施和施肥措施對(duì)玉米產(chǎn)量和單產(chǎn)增溫潛勢(shì)的影響,以此提出了兼顧作物產(chǎn)量和溫室氣體排放量的農(nóng)田管理調(diào)控措施。結(jié)果表明:(1)當(dāng)沉陷坡面坡度大于12°時(shí),坡面作物產(chǎn)量下降迅速,且單產(chǎn)增溫潛勢(shì)急劇上升,因此,本研究提出應(yīng)將采煤沉陷坡度控制在12°以內(nèi),以減小采煤沉陷坡面對(duì)產(chǎn)量和溫室氣體排放的影響;(2)綜合考慮產(chǎn)量和單產(chǎn)增溫潛勢(shì),提出了適合采煤沉陷坡面的低碳高產(chǎn)的農(nóng)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(lái)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(nóng)業(yè)大學(xué)資源環(huán)境學(xué)院;
【基金】：國(guó)家自然科學(xué)青年基金項(xiàng)目(編號(hào):51304130) 山西省青年科技研究基金項(xiàng)目(編號(hào):2015021125) 國(guó)家自然科學(xué)基金項(xiàng)目(編號(hào):51074154/E042203) 山西農(nóng)業(yè)大學(xué)基金項(xiàng)目(編號(hào):20132-13)
【分類號(hào)】：S513;TD82

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