本文關(guān)鍵詞： 高寒草甸 黑土灘治理 封育 治理監(jiān)測 退化草地 青海省　出處：《西北農(nóng)林科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：試驗采用隨機取樣方法,于2011-2015每年8月中旬對青海省玉樹州雜多縣重度和中度退化草地治理情況進行了5年連續(xù)監(jiān)測。通過對草層高度、生物量、溫度和降水量的測定記載和綜合分析,進一步摸清了高寒草甸草地退化的影響因素、治理現(xiàn)狀以及解決對策等。試驗結(jié)果表明:(1)不同處理下會導(dǎo)致產(chǎn)草量和高度差異,通過分析,2011-2013年優(yōu)良牧草和雜類草干重均為黑土灘治理處理封育處理對照,但2014和2015年優(yōu)良牧草和雜類草干重均為黑土灘治理處理對照封育處理;2011-2013年植物平均高度均為黑土灘治理處理封育處理對照,2014和2015年植物平均高度則為黑土灘治理處理對照封育處理,最高高度達11.73cm;(2)黑土灘處理優(yōu)良牧草生物量干重和植物平均高度逐年增加,在2014-2015年達到最高,且2014和2015年優(yōu)良牧草生物量干重和植物平均高度均顯著高于2011-2013年(P0.05);(3)封育處理下牧草生物量干重和植物平均高度持續(xù)增加,在2014年達到最高,均顯著高于前3年(P0.05);(4)對照處理在2011年優(yōu)良牧草生物量干重和植物平均高度最高,顯著高于2013和2015年(P0.05),并且逐年呈現(xiàn)出略降低的趨勢,但2014年卻有所增加除外;(5)牧草生物量和植物平均高度在黑土灘治理、封育處理下均逐漸增加,對照略有下降,2014年隨降水量和年平均氣溫快速增加,牧草生物量干重和植物平均高度也均呈迅速增加的趨勢,但年平均氣溫與降水量在2015年急劇下降,牧草生物量也受到一定影響�？傊�,退化草地經(jīng)過黑土灘治理和封育處理后有明顯改良效果,同時溫度和降水對其也有一定影響。
[Abstract]:A random sampling method was used to monitor the treatment of severe and moderately degraded grassland in Zadou County of Yushu Prefecture, Qinghai Province, on middle of August of 2011 to 2015. The measurement records and comprehensive analysis of temperature and precipitation were used to find out the influencing factors of grassland degradation, the current situation of treatment and the countermeasures. The results showed that the different treatments would lead to the difference of grass yield and height. The dry weight of fine forage and hybrid grasses from 2011 to 2013 was analyzed and compared with black soil beach treatment and fencing treatment. But in 2014 and 2015, the dry weight of fine forage and mixed grasses were treated by black soil beach treatment, the average plant height in 2011-2013 was the average height of black soil beach treatment, and the average plant height in 2014 and 2015 was black soil beach treatment. Treatment, control, fencing, The highest height was 11.73 cm / m ~ (2)) the dry weight and average height of fine forage biomass increased year by year, and reached the highest in 2014-2015. The dry weight and average plant height of fine forage biomass in 2014 and 2015 were significantly higher than that of P0.05P0.05T3 in 2011-2013. The dry weight and average height of forage biomass increased continuously under fencing treatment, and reached the highest in 2014. In 2011, the biomass dry weight and average plant height of fine forage were the highest, which were significantly higher than that of P0.05 in 2013 and 2015, and showed a decreasing trend year by year. But in 2014, the biomass and average height of forage increased gradually under the treatment of black soil beach, but decreased slightly in contrast, and increased rapidly with precipitation and annual average temperature in 2014. The dry weight and average plant height of forage biomass also increased rapidly, but the annual mean temperature and precipitation decreased sharply in 2015, and the forage biomass was also affected to some extent. The degraded grassland was improved obviously by black soil beach treatment and closed, and temperature and precipitation also had some influence on it.
【學(xué)位授予單位】：西北農(nóng)林科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S812

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