Quality and Safety Evaluation of Different Functional Controlled-Release Fertilizers and Their Effects on Rape Growth
In connection with the difficulties of traditional controlled-release fertilizers in effectively overcoming problems such as low fertilizer utilization and crop physiological disorder caused by water shortage,secondary salinization and extreme climate threat in agricultural production,three kinds of functional controlled-release fertilizers specially designed for regional crops have been developed,including water-retaining fertilizer,growth-promoting fertilizer and salt-resistant fertilizer.The contents of toxic and harmful substance in the three functional controlled-release fertilizers are detected,and the crop adaptability of the above fertilizers is evaluated through potted rape and field plot experiments.The results show that the contents of total arsenic,total cadmium,total lead,total chromium,total mercury and total thallium in the three functional controlled-release fertilizers meet the limitation requirements of the national standard Limitation requirements of toxic and harmful substance in fertilizers(GB 38400-2019).Under the same fertilization rate,the leaf number and leaf area of potted rape treated with the three functional controlled-release fertilizers are higher than those treated with conventional fertilization.Under the condition of reducing the fertilization rate,the application of functional controlled-release fertilizers can significantly promote the growth of field rape,and the effect of growth promoting type controlled-release fertilizer is better.
functional controlled-release fertilizertoxi and harmful substancesafety evaluationrapegrowth effect
万方数据
维普
