本文關(guān)鍵詞：狹葉錦雞兒灌叢沙堆土壤水分和肥力的時(shí)空分布　出處：《干旱區(qū)研究》2016年02期 　論文類型：期刊論文

  更多相關(guān)文章： 狹葉錦雞兒(Caragana stenophylla) 灌叢沙堆 土壤水分 土壤肥力 空間分布

【摘要】：通過對內(nèi)蒙古高原草原區(qū)、荒漠草原區(qū)和荒漠區(qū)狹葉錦雞兒(Caragana stenophylla)不同發(fā)育階段灌叢沙堆土壤有機(jī)質(zhì)、全氮、全磷、速效磷和水分的空間分布研究。結(jié)果發(fā)現(xiàn):3種生境中,灌叢土壤水肥含量表現(xiàn)為:草原區(qū)荒漠草原區(qū)荒漠區(qū)。在草原區(qū)和荒漠草原區(qū),狹葉錦雞兒灌叢沙堆土壤全氮和全磷隨土層加深(0~10 cm、10~20 cm、20~40 cm)呈逐漸增加趨勢,而速效磷和水分相反;草原區(qū)灌叢沙堆土壤有機(jī)質(zhì)富集于0~10 cm土層,荒漠草原區(qū)富集于20~40 cm土層。在荒漠區(qū),灌叢對水分和大部分養(yǎng)分(除速效磷)的層間分布影響不大,而20~40 cm土層的速效磷含量逐漸減少。3種生境中狹葉錦雞兒灌叢內(nèi)的養(yǎng)分含量均高于灌叢外相同土層,且隨著灌叢增大,這種趨勢越來越明顯;在草原區(qū),隨著狹葉錦雞兒冠幅增大,灌叢土壤水分含量呈顯著下降趨勢,在荒漠草原區(qū)和荒漠區(qū),灌叢土壤水分含量隨著灌幅增大而增加。這說明狹葉錦雞兒灌叢改變了土壤水分和肥力的空間分布,這種效應(yīng)是在灌叢沙堆的發(fā)育過程中逐漸形成,并體現(xiàn)出來的。
[Abstract]:The soil organic matter, total nitrogen and total phosphorus of scrub sandpile in different development stages were studied in the grassland, desert grassland and desert area of Inner Mongolia. The spatial distribution of available phosphorus and water was studied. The results showed that the content of water and fertilizer in scrub soil of three habitats were as follows: desert grassland desert region desert grassland and desert grassland. The total nitrogen and total phosphorus in the sandy pile of Caragana angustifolia increased gradually with the deepening of soil layer (10 ~ 10 cm ~ (-1) ~ 10 ~ (20) cm ~ (-1) ~ (20) cm ~ (20) ~ (40) cm), but the available phosphorus and water content were opposite. The soil organic matter of shrub sand pile in grassland area is concentrated in 0 ~ 10 cm soil layer, and desert grassland area is in 20 ~ 40 cm soil layer, and it is in desert area. The shrub had little effect on the interlayer distribution of water and most nutrients (except available phosphorus). However, the available phosphorus content in the soil layer of 20 ~ 40cm was decreased gradually. 3. The nutrient content of Caragana angustifolia shrub was higher than that of the same soil layer outside the shrub, and with the increase of the shrub, the trend was more and more obvious. In the steppe area, with the increase of the crown width of Caragana angustifolia, the soil moisture content of shrub showed a significant downward trend, in desert grassland and desert region. The soil moisture content increased with the increase of shrub amplitude, which indicated that the spatial distribution of soil moisture and fertility was changed by Caragana angustifolia shrub, and this effect was gradually formed during the development of shrub sand heap. And embody it.
【作者單位】： 天津師范大學(xué)生命科學(xué)學(xué)院天津市動(dòng)植物抗性重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(31570453,31170381)
【分類號(hào)】：S714
【正文快照】： 錦雞兒屬(Caragana)植物屬于豆科(Legumino-sae),全世界有100余種,主要分布在亞洲和歐洲的干旱和半干旱地區(qū)〔1-3〕。狹葉錦雞兒(Caraganastenophylla)是錦雞兒屬的重要物種,分布于我國內(nèi)蒙古高原和新疆北部〔4〕。狹葉錦雞兒能適應(yīng)半濕潤、半干旱和干旱環(huán)境,在內(nèi)蒙古草原區(qū)、

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