Liu Jing-Jing, Yin Ya-Li, Li Shi-Xiong, Zhao Wen, Su Shi-Feng, Dong Yi-Ling
Academy of Animal and Veterinary Science, Qinghai University, Xining 810016, China.
Academy of Animal and Veterinary Science, Qinghai University, Xining 810016, China; Qinghai Academy of Animal and Veterinary Science, Xining 810016, China.
Ying Yong Sheng Tai Xue Bao. 2022 Apr;33(4):988-994. doi: 10.13287/j.1001-9332.202203.009.
We examined the effects of different regulation measures (spring rest grazing, spring rest grazing-cutting turf, spring rest grazing-cutting turf-fertilization, spring rest grazing-cutting turf-sowing, spring rest grazing-cutting turf-fertilization-sowing) on vegetation, soil physical and chemical properties, and soil microbial biomass in mode-rately degraded alpine meadow in Qilian Mountain. The results showed that all the regulation measures significantly increased plant coverage and aboveground and underground biomass of degraded alpine meadows. Plant species richness increased significantly under the two measures of spring rest grazing-cutting turf-fertilization and spring rest grazing-cutting turf-fertilization-sowing. The dominant species of spring rest grazing-cutting turf-sowing and spring rest grazing-cutting turf-fertilization-sowing was cv. Qinghai. Soil pH and bulk density in moderately degraded alpine meadow (control) were significantly higher than those of all regulation measures. Soil water content, soil organic carbon, total nitrogen and total potassium, carbon-nitrogen ratio and nitrogen-phosphorus ratio of spring rest grazing-cutting turf-fertilization-sowing measures were the highest, which were 21.3%, 22.30 g·kg, 2.77 g·kg, 19.93 g·kg, 8.3 and 3.5, respectively. Soil microbial biomass nitrogen and phosphorus (104.98 and 40.74 mg·kg) of degraded meadows under spring rest grazing-cutting turf-fertilization-sowing measures were significantly higher than those of other measures, while soil microbial biomass carbon (240.72 mg·kg) of degraded meadows under spring rest grazing-cutting turf-fertilization measures was significantly higher than that of other measures. The results of radar map showed that the regulation measures affected the characteristics of degra-ded meadow vegetation (aboveground and underground biomass), soil physical and chemical properties (water content, organic carbon, total nitrogen, total phosphorus, and total potassium) and soil microbial biomass (carbon, nitrogen and phosphorus). Spring rest grazing-cutting turf-fertilization-sowing measures had the best performance in restoraing degraded meadows in the study area.
我们研究了不同调控措施（春季休牧、春季休牧 - 割草、春季休牧 - 割草 - 施肥、春季休牧 - 割草 - 播种、春季休牧 - 割草 - 施肥 - 播种）对祁连山中度退化高寒草甸植被、土壤理化性质和土壤微生物生物量的影响。结果表明，所有调控措施均显著提高了退化高寒草甸的植被盖度以及地上和地下生物量。在春季休牧 - 割草 - 施肥和春季休牧 - 割草 - 施肥 - 播种这两种措施下，植物物种丰富度显著增加。春季休牧 - 割草 - 播种和春季休牧 - 割草 - 施肥 - 播种的优势种为青海垂穗披碱草。中度退化高寒草甸（对照）的土壤pH值和容重显著高于所有调控措施下的土壤。春季休牧 - 割草 - 施肥 - 播种措施的土壤含水量、土壤有机碳、全氮、全钾、碳氮比和氮磷比最高，分别为21.3%、22.30 g·kg、2.77 g·kg、19.93 g·kg、8.3和3.5。春季休牧 - 割草 - 施肥 - 播种措施下退化草甸的土壤微生物生物量氮和磷（104.98和40.74 mg·kg）显著高于其他措施，而春季休牧 - 割草 - 施肥措施下退化草甸的土壤微生物生物量碳（240.72 mg·kg）显著高于其他措施。雷达图结果表明，调控措施影响了退化草甸植被特征（地上和地下生物量）、土壤理化性质（含水量、有机碳、全氮、全磷和全钾）和土壤微生物生物量（碳、氮和磷）。在研究区域，春季休牧 - 割草 - 施肥 - 播种措施在恢复退化草甸方面表现最佳。
