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- Title
种植结构非粮化对农田氮磷流失负荷的影响.
- Authors
邱乐丰; 张玲; 徐保根; 吴绍华; 徐明星
- Abstract
Taking Cixi City, Zhejiang Province as a case area, the evolution process of non-grain transformation of planting structure was analyzed by establishing a non-grain index (NGP), and field investigation, literature survey and statistical yearbook data were used to estimate farmland nitrogen and phosphorus input and runoff loss. Its impact on the runoff load of nitrogen and phosphorus in farmland provides a scientific basis for in-depth understanding of the ecological effect of non-grained planting structure and rational control of agricultural non-point source pollution. The results show that: from 1995 to 2019, the planting structure in Cixi City has obvious differences. In the trend of non-grain transformation, the planting area of grain crops dropped sharply by 49.3%, while the planting area of vegetables and fruits increased by 113.8% and 108.4%, respectively. According to NGP, the non-grain transformation process of Cixi can be divided into three stages: the stable rising period (1995— 2007), the period of correction and decline (2007-2013) and the period of rapid rise (2013-2019). From 2001 to 2018, the total growth rate of nitrogen and phosphorus input in the planting industry in Cixi City was 38.8% and 249.5% respectively. By 2018 In 2010, the nitrogen and phosphorus loss loads of farmland in Cixi City were 2823.3 t and 971.5 t, respectively. With the non-grain planting structure, vegetable fields have replaced rice fields as the primary source of nitrogen and phosphorus loss from local farmland, accounting for the annual nitrogen and phosphorus loss in Cixi City’s planting structure. 70.9% and 89.2% of the total loss of phosphorus and phosphorus, which have become the key objects of agricultural non-point source pollution control. It is recommended that localities formulate differentiated control policies for different types of non-grain crops, and add the loss of nitrogen and phosphorus nutrient loads in farmland to soil quality evaluation. The system provides a basis for guiding the adjustment of the planting structure in the next stage.
- Subjects
ZHEJIANG Sheng (China); NONPOINT source pollution; PLANT genetic transformation; PADDY fields; SOIL quality; IMPACT loads; GRAIN
- Publication
Acta Agriculturae Zhejiangensis, 2022, Vol 34, Issue 9, p1995
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.2022.09.18