<p>This dataset records field observation data of vegetation species richness, height, coverage, aboveground biomass, phenology and other biological factors in four grassland ecological samples of Tajikistan, Lucholb, Tabakchi and Ziddi in 2019. The Blakhi prototype was built in June 2019 and belongs to the desert grassland ecosystem. The Luchob quadrat was built in June 2018 and belongs to the mountainous meadow ecosystem. The Tabakchi quadrat was built in June 2019 and belongs to the desert grassland ecosystem. The Ziddi plot was built in June 2019 and belongs to the desert grassland ecosystem. The design specification of the ecological sample plot is 100 m × 100 m. Each sample plot is evenly divided into 3*3m recording sample plots at intervals of 1m and 4 rows and 5 columns. The species richness, height, coverage, and phenology are investigated and recorded in the 1 m × 1 m small squares set up in the recording sample plot. After the investigation, the above-ground parts of the plants in the small sample were harvested, weighed for fresh weight, and then taken back to the laboratory for dry weight. Observations are made twice a year from May to August at the beginning and end of the growing season. In 2021, observation equipment such as the Campbell CCFC phenology camera will be installed in the sample plot to obtain vegetation phenology data. </p>
From 2018 to 2019, the Xinjiang Institute of Ecology and Geography of China Academy of Sciences and the Tajikistan Academy of Sciences jointly built four ecological sample plots in Tajikistan, Lucholb, Blakhi, Tabakchi and Ziddi. The data comes from field ecological sample monitoring surveys.
Data collection process: The unified design specification of the ecological plot is 100 m × 100 m. Fences are established, and 1 sample plots of 3m×3m are divided into every 1m interval within the fence. There are a total of 12 sample plots in 4 rows ×3 columns, which are randomly assigned into 4 replicate groups, and a range of 1m×1m was randomly selected in each sample plot for sampling. The control group, N30, P30, N30P30, and N90P30 respectively corresponded to no fertilizer, application of nitrogen fertilizer 3 g/m2, application of phosphorus fertilizer 3 g, application of nitrogen fertilizer 3 g, application of nitrogen fertilizer 9 g, and application of phosphorus fertilizer 3 g, respectively. Observe and record the vegetation growth under different fertilization amounts. Collection and recording of species richness data: In a small sample of 1m×1m, record the number of all plant species, and the unit is counted in number. Collection and recording of above-ground biomass data: In a small sample of 1m×1m, cut off all plants at the root of the ground, and weigh all plants on site to get the weight of fresh grass in grams/m2; Then take the cut plants back to the laboratory and use a drying box, adjust to 65℃ for 5 hours, take them out, cool and weigh to get the weight of the hay in grams/m2. In 2021, observation equipment such as the Campbell CCFC phenology camera will be installed in the sample plot to obtain vegetation phenology data. All data collection was performed in 5 groups and 4 replicates. The monitoring frequency of monitoring indicators is shown in the following table:
monitoring indicators monitoring frequency monitoring time vegetation coverage 1 time/year whole growing season species composition 1 time/year period of vigorous growth Height 1 time/year period of vigorous growth primary productivity 1 time/year period of vigorous growth Phenology once per week whole growing season
Data collection, processing and processing records are based on the "National Technical Specifications for Survey and Evaluation of Ecological Status-Field Observation of Grassland Ecosystem"(HJ 1168-2021).
| # | number | name | type |
| 1 | XDA20000000 | Other |
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CSTR:33110.11.ariddc.00303
10.12389/ariddc.00303