Abstract:

To understand the current situation of agricultural non-point source pollution (NSP) in Shaanxi Province and provide a theoretical basis for controlling the agricultural non-point source pollution, we analyzed the consumption of fertilizer, pesticide, agricultural film, the discharge of livestock wastes, and the amount of generated straw and its corresponding input intensity and load, based on the agricultural statistical data from 2005 to 2018 and NSP calculation methods provided by literature. The results showed that both the input intensity and consumption of fertilizer peaked in 2013, with 241.73×10⁴ t and 841.98 kg/hm², respectively; the pesticide consumption increased year by year and the input intensity slightly decreased in recent years; the consumption and input intensity of agricultural and plastic film overall increased yearly, and showed a stagnant increase in recent years; the amount of discharged livestock wastes and discharge load generally showed a continuous decline, slightly fluctuated in some years; the generation of crop straw and load steadily increased, yet with minor increase recently. Therefore, the NSP pattern in Shannxi demonstrates a positive correlation with policy regulations as well as technology stimulation, presenting a declining trend in general. Accordingly, top priority should be given to technology optimization and upgrade and scientific adjustment of regulations, aiming to reduce NSP and promote sustainable agriculture development.

Key words: agricultural non-point source pollution, current situation analysis, input intensity, emission load, chemical fertilizer, pesticide, livestock excrement