摘要
[目的]研究生物质炭单施和与氮肥配施对灌区春小麦群体结构、光合特性及产量的影响,为生物质炭及化肥的合理利用提供科学依据.[方法]试验采用随机区组设计,设2个氮肥施用水平(0、150 kg/hm2),4个生物质炭水平(0、10、20和30 t/hm2),于2020年对新春46号的群体结构、光合特性及产量进行分析.[结果]在B2N1处理,即氮肥减量(150 kg/hm2)与中量生物质炭(20 t/hm2)配施下,春小麦群体结构、叶面积指数、叶片SPAD值、净光合速率及产量均达到最佳,较对照分别提高了 15.04％-32.98％、3.67％～89.82％、5.63％-11.46％、17.95％-81.68％和29.73％.与对照相比,单施生物质炭及生物质炭与氮肥配施均提高了春小麦产量,增产幅度为7.52％-29.73％.[结论]氮肥减量150kg/hm2配施20t/hm2生物质炭(B2N1)其增产效果最佳.
Abstract
[Objective]This study further carried out the research on the impact of biochar single applica-tion and combined application of nitrogen fertilizer on the population structure,photosynthetic characteristics and yield of spring wheat in irrigation areas,aiming to provide scientific basis for the rational use of biochar and fertilizer.[Methods]The experiment adopted a randomized block design,set up 2 nitrogen fertilizer ap-plication levels(0,150 kg/hm2)and 4 levels of biomass charcoal(0,10,20,30 t/hm2)for research.After that,the population structure,photosynthetic characteristics and yield of Xinchun 46 wheat were analyzed in 2020.[Results]The results showed that under B2N1 treatment,nitrogen fertilizer reduction(150 kg/hm2),compared to medium biomass charcoal(20 t/hm2)under the combined application,the population structure,leaf area index,leaf SPAD value,net photosynthetic rate,and yield of spring wheat all reached the optimal level,increased by 15.04％to 32.98％,3.67％to 89.82％,5.63％to 11.46％,17.95％to 81.68％,and 29.73％compared to the control,respectively.Compared with the control,the single application of bio-char and the combination of biochar and nitrogen fertilizer increased spring wheat yield by 7.52％to 29.73％.[Conclusion]Nitrogen fertilizer is reduced by 150 kg/hm2 and applied in combination with 20 t/hm2(B2N1)biochar has the best effect in increasing production.
基金项目
国家自然科学基金项目(32260326)
新疆维吾尔自治区现代农业产业(小麦)体系项目()
新疆农业大学大学生创新项目(dxscx2023009)
维普
万方数据