本文選題：畢節(jié)高原山地 + 小氣候��； 參考：《江蘇農(nóng)業(yè)科學》2017年05期

【摘要】：通過典型樣地觀測,對貴州省畢節(jié)高原山地5種石漠化等級樣地的小氣候進行常規(guī)監(jiān)測,對比分析其氣溫、光照度、相對濕度和5、10、15、20 cm處土壤溫度的分布狀況和日變化動態(tài)。結(jié)果表明,不同等級石漠化地區(qū)由于植被數(shù)量和組成結(jié)構(gòu)存在差異,其樣地小氣候也表現(xiàn)出不同的特征。夏季,隨著石漠化等級的提高,石漠化樣地內(nèi)的光照度與氣溫逐漸降低,降幅趨緩,峰值出現(xiàn)時間也滯后;冬季,由于人為干擾,光照度變幅表現(xiàn)為ST(強度)SL(輕度)M(中度)L(潛在)N(無),氣溫變幅表現(xiàn)為STSLLMN;相對濕度變幅在夏季表現(xiàn)出與石漠化等級相吻合的現(xiàn)象,冬天則表現(xiàn)為MSTLNSL。與其他研究不同,本研究中出現(xiàn)了下層土壤溫度高于上層土壤的獨特現(xiàn)象。各樣地光照度、氣溫和土壤溫度之間呈正相關,三者均與空氣相對濕度呈負相關�？傮w來說,無石漠化、潛在石漠化樣地環(huán)境趨于涼濕化,小氣候條件最佳;而中度、強度石漠化樣地環(huán)境趨于干熱化,小氣候條件較差,有待于經(jīng)歷較長時間的演替改善。
[Abstract]:The microclimate of five rocky desertification grade plots in Bijie Plateau of Guizhou Province was monitored by means of typical soil samples. The distribution and diurnal variation of temperature, light intensity, relative humidity and soil temperature at 1520 cm were compared and analyzed. The results show that the microclimate of different grade rocky desertification areas shows different characteristics due to the difference of vegetation quantity and composition structure. In summer, with the increase of rocky desertification grade, the light intensity and temperature in rocky desertification land gradually decrease, the decline is slow, and the time of peak value also lags; in winter, due to human disturbance, the light intensity and temperature decrease gradually, and the peak value also lags behind. The variation amplitude of light intensity is shown as STSLLMN (light intensity SLL), while the amplitude of relative humidity is consistent with the grade of rocky desertification in summer and MSTLNSLS in winter. Different from other studies, there is a unique phenomenon that the lower soil temperature is higher than that of the upper soil. There was a positive correlation between light intensity, temperature and soil temperature, and there was a negative correlation between light intensity and air relative humidity. In general, without rocky desertification, the environment of the potential rocky desertification land tends to cool and wet, and the microclimate condition is the best, while the intensity rocky desertification sample land environment tends to dry and heat, and the microclimate condition is poor, which needs to be improved for a long time.
【作者單位】： 貴州師范大學中國南方喀斯特研究院/貴州省喀斯特山地生態(tài)環(huán)境國家重點實驗室培育基地;
【基金】：國家“十二五”科技支撐計劃重大課題(編號:2011BAC09B01) 貴州省科技計劃重大專項(編號:[2004]6007號)
【分類號】：P463.2;S153

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