青海省杂多县退化草地治理监测与成效分析

发布时间：2018-02-23 00:38

本文关键词： 高寒草甸黑土滩治理封育治理监测退化草地青海省　出处：《西北农林科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：试验采用随机取样方法,于2011-2015每年8月中旬对青海省玉树州杂多县重度和中度退化草地治理情况进行了5年连续监测。通过对草层高度、生物量、温度和降水量的测定记载和综合分析,进一步摸清了高寒草甸草地退化的影响因素、治理现状以及解决对策等。试验结果表明:(1)不同处理下会导致产草量和高度差异,通过分析,2011-2013年优良牧草和杂类草干重均为黑土滩治理处理封育处理对照,但2014和2015年优良牧草和杂类草干重均为黑土滩治理处理对照封育处理;2011-2013年植物平均高度均为黑土滩治理处理封育处理对照,2014和2015年植物平均高度则为黑土滩治理处理对照封育处理,最高高度达11.73cm;(2)黑土滩处理优良牧草生物量干重和植物平均高度逐年增加,在2014-2015年达到最高,且2014和2015年优良牧草生物量干重和植物平均高度均显著高于2011-2013年(P0.05);(3)封育处理下牧草生物量干重和植物平均高度持续增加,在2014年达到最高,均显著高于前3年(P0.05);(4)对照处理在2011年优良牧草生物量干重和植物平均高度最高,显著高于2013和2015年(P0.05),并且逐年呈现出略降低的趋势,但2014年却有所增加除外;(5)牧草生物量和植物平均高度在黑土滩治理、封育处理下均逐渐增加,对照略有下降,2014年随降水量和年平均气温快速增加,牧草生物量干重和植物平均高度也均呈迅速增加的趋势,但年平均气温与降水量在2015年急剧下降,牧草生物量也受到一定影响。总之,退化草地经过黑土滩治理和封育处理后有明显改良效果,同时温度和降水对其也有一定影响。
[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.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S812

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