EFFECT OF HEAVY METAL CONTAMINATED SOIL ON FORAGE QUALITY BASED ON ENVIRONMENTAL PROTECTION.

The development of industrial and agricultural technology, especially the progress of industrial civilization, industrial production and automobile exhaust will emit a large number of heavy metal elements, resulting in serious soil heavy metal pollution. The polluted soil has a serious impact on the growth and quality of forage grass. To study the impact of heavy metal contaminated soil on forage quality is very important for the safe production of forage. In view of this problem, this paper first analyzes the experimental design and experimental steps of the impact analysis of heavy metal contaminated soil on forage quality, takes the common forage bullwhip as the research object of forage, and takes the heavy metals copper, cadmium and lead as the research object of heavy metals. It is proposed to evaluate the forage quality by measuring the growth characteristic index, mature nutrient index and heavy metal accumulation index of bullwhip, and the determination method of relevant indexes is put forward. Single factor analysis showed that the three kinds of heavy metal contaminated soil were not conducive to the growth of forage grass. With the increase of soil heavy metal pollution, the growth characteristics of forage were seriously affected, and the average plant height (PH) and average biomass (DW) gradually decreased. The average plant height decreased from 44cm to about 12cm, and the average biomass decreased from 70g to about 20g. Compared with the control group, the average plant height and average biomass of forage in the polluted soil decreased by more than 70%. With the increase of soil heavy metal pollution, the content of Forage Crude Protein (CP) decreased gradually, the proportion of CP decreased by about 50%, the content of neutral detergent fiber (NDF) increased gradually, the accumulation of heavy metals in forage increased gradually, and the forage quality decreased continuously. Through experimental analysis, it can provide reference for forage safety production. [ABSTRACT FROM AUTHOR]