Preliminary exploration of the optimal land use strategy for sludge and economic benefit evaluation
The development of resource-oriented utilization of sludge,improving the resource utilization rate of sludge,is of great significance for preventing urban ecological environment pollu-tion,achieving resource cycling and promoting green social development.This study is based on a long-term field positioning experiment of the typical wheat-corn rotation system in the North China Plain.By using different amounts of composted sludge to partially replace chemical fertilizer,the impact of using fertilized sludge on crop yield and economic benefits from 2007 to 2022 is explored,aiming to provide theoretical support for the efficient resource utilization of sludge.The results show that the effect of increasing composted sludge application between 0.5W+0.5N and W+0.5N treatments is equivalent to that of the N treatment.Under the 4W+0.5N treatment,the yield of crops is the highest,with average economic yields of 5131.75 kg/ha for wheat and 8853.16 kg/ha for corn during the experiment.The yield of crops shows a significant positive correlation with the application rate of sludge,with a correlation coefficient reaching 0.85.Under different sludge application treatments,the net income of wheat and corn under the W+0.5N treatment rea-ches the highest,respectively 19 453.22 YUAN/hm2 and 18 848.43 YUAN/hm2.
万方数据
维普
