Ma et al.: Responses of soil factors to nutrient inputs under different farmland uses - 667 - RESPONSES OF SOIL FACTORS TO NUTRIENT INPUTS UNDER DIFFERENT FARMLAND USES MA, X.1,2,3 – WU, H.3 – CHEN, H.4 – SUN, R.5 – YANG, X.3 – QIAO, W.1 – FANG, B.1* 1School of Geography Science, Nanjing Normal University, Nanjing 210023, China 2Institute of Geographical Sciences, Henan Academy of Sciences Henan Province, Zhengzhou 450052, China 3Huzhou City Environmental Monitoring Center Station, Huzhou 313000, China 4Education in Qingfeng County, Puyang City, Henan Province, Puyang 457300, China 5Puyang City Environmental Monitoring Center Station, Puyang 457343, China *Corresponding author e-mail:
[email protected] (Received 12th Oct 2018; accepted 19th Nov 2018) Abstract. To understand the responses of changes of soil factors to nutrient inputs under different farmland uses, we analysed soil test data from different crop land uses before and after harvest in combination with the farmers’ survey over the cultivation years in Pujiang County, Zhejiang Province, China. The results showed that the inputs of the crop nutrients and the levels of soil nutrients were significantly correlated on the regional scale. Farmers’ fertilisation habits resulted in an excess of phosphorous and potassium in the soil, potentially leading to environmental pollution. The excessive investment of nitrogen and phosphate may have decreased the farmland soil’s pH value. For vegetable crops, no significant correlation between the crop nutrient and the levels of soil nutrients was found.This might be due to the randomness of nutrient inputs mainly driven by economic interests. We suggest that soil tests be carried out to help improve nutrient management in Pujiang County, especially for non-cereal and oil crops.