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通过 10年土壤监测数据分析表明 ,在常规施肥和管理水平下 ,南方二熟制稻田区三种种植制度中 ,施肥区麦 -稻与蚕豆 -稻两种种植制度的冬作产量上升趋势明显 ,夏作水稻和冬水田水稻产量 75 0 0 kg/ hm2左右 ,比较稳定。三种种植制度的土壤有机质和全氮基本稳定 ,有上升趋势 ;有效磷稳中有升 ;速效钾除麦 -稻外下降趋势明显。主要原因是施肥的影响。农田养分平衡状况是氮磷有余而钾不足。
Through 10 years of soil monitoring data analysis shows that under the conventional fertilization and management levels, winter crop yield of wheat-rice and broad bean-rice cultivation system in fertilization area increased significantly in three kinds of planting system in southern second cropping paddy field, Summer paddy rice and winter paddy rice yield about 75 0 0 kg / hm2, more stable. Soil organic matter and total nitrogen of the three planting systems were basically stable, with an upward trend; available phosphorus rose steadily; available potassium in addition to wheat - rice outside the obvious downward trend. The main reason is the impact of fertilization. Farmland nutrient balance is more than nitrogen and phosphorus deficiency.