So far, most of the studies on warming and rainfall enhancement have focused on discussing the effects on plant or ecosystem productivity, while relatively few studies have studied plant nutrient elements and their distribution patterns. The analysis of soil water temperature rapid measuring instrument found that the increase in temperature caused the decrease of soil water content, thus limiting the absorption of the elements of the plant. While increasing the soil moisture conditions in the improvement of soil moisture is conducive to the absorption of soil elements by plants, it is also easy to cause nutrient elements through leaching. Loss.
Compared with the control, the nutrient elements in the reproductive branches and vegetative branches increased at the same temperature and increased rainfall were N, P and K, and the proportion of N elements in the reproductive branches increased slightly (P<0.05), indicating that the temperature and rainfall increase treatment. Promote the absorption and translocation of N from Artemisia frigida; nutrients with simultaneous decrease in reproductive and vegetative shoots after temperature-enhancement and rainfall-increase treatment are Mg, Al, Zn, Fe, Mn, Ni, and 5 elements other than Al in the reproductive branches The distribution ratios in the two crops all decreased slightly, suggesting that increasing temperature and increasing rainfall will affect the uptake and distribution of Mg, Fe, Mn, and Ni by Artemisia frigida; the elements that decrease the content of reproductive branches after increasing rainfall and increase the content of vegetative shoots are C, Ca, and Cu , And their distribution ratio in the reproductive branches are slightly reduced, indicating that increasing temperature and increasing rainfall will affect the uptake and distribution of Artemisia frigida K. In addition, the absorption and distribution of N, K, and Mn in Artemisia frigida had significant differences among different sites (P<0.05), indicating that there were transport and redistribution of these elements between different organs.
After measuring the soil moisture content of grassland, the soil moisture temperature quick measuring instrument can clearly determine that moisture is the dominant limiting factor of the grassland. Increasing rainfall treatment improves the soil moisture condition and affects the uptake and distribution of nutrient elements by cold and high temperature, and the coupling effect of warming and rain increases. It is more complicated than pure warming or raining. The absorption and distribution of nutrients by plants is not only related to soil moisture and temperature conditions, but also related to the plant's intrinsic regulatory function (phenology) and the time and density of test treatment.
Plant growth is affected by many factors, among which temperature and moisture are key factors, because changes in the temperature and moisture of the environment will change the physiological and ecological characteristics of the plant, thereby directly or indirectly affecting plant growth and accumulation of photosynthetic products. Therefore, temperature and moisture have always been one of the issues of great concern in the agricultural production process. Artemisia frondosa is an excellent herbage feed, and it is also a kind of plant with important ecological functions such as windbreak and sand fixation, water and soil conservation, and protection of the ecological environment. Therefore, it is very important to analyze the moisture temperature requirements during the planting process. In particular, analysis of soil moisture and temperature, on this issue, soil water temperature thermometry can be used to determine the soil moisture temperature scientifically, and to provide support for the development of research work.