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长期施用有机肥,可极显著提高(土串女)土中有效锌、锰、铜的含量,使水溶性氟呈下降趋势,对全镉含量无明显影响。在当前生产水平和氮磷化肥施用量条件下,欲维持土壤有效锌、锰、铜原供应强度,每年应施37.5tha~(-1)有机肥。但从养分平衡考虑,其中的有效锌和铜尚不能补偿一年两熟的作物携出,应加倍施用。随有机肥用量增加,小麦、玉米植株中锌、锰、铜浓度降低。土壤对锌、锰、铜的供应有相当的自动调节能力。有机肥施用量和土壤锌、锰、铜的消长值之间有显著相关关系;3种微量营养元素的产、投理论盈亏量和土壤实际消长量之间也呈显著相关,其参数对推荐施肥有参考价值。
Long-term application of organic fertilizers can significantly increase the content of available zinc, manganese and copper in soils so that the water-soluble fluorine shows a downward trend and has no obvious effect on the total cadmium content. Under the current production level and nitrogen and phosphorus fertilizer application, to maintain the original zinc, manganese and copper supply intensity, 37.5tha ~ (-1) organic fertilizer should be applied annually. However, in view of nutrient balance, the effective zinc and copper among them can not compensate crops that are double cooked in one year and should be doubled. With the increase of organic fertilizer, the concentrations of Zn, Mn and Cu in wheat and corn plants decreased. Soil on the supply of zinc, manganese, copper has a considerable ability to automatically adjust. There was a significant correlation between the application rate of organic manure and the growth and decrement of soil Zn, Mn and Cu. There was also a significant correlation between the profit and loss of the three kinds of micronutrients and actual soil moisture consumption. A reference value.