Zhao Na, Ma Jun, Wu Linmei, Li Xiaohong, Xu Hongwei, Zhang Jun, Wang Xiquan, Wang Yongqiang, Bai Lanfang, Wang Zhigang
College of Agronomy, Inner Mongolia Agricultural University, Hohhot 010019, China.
Bayannur Academy of Agricultural and Animal Sciences, Linhe 015400, China.
Plants (Basel). 2024 Aug 13;13(16):2250. doi: 10.3390/plants13162250.
The combined application of manure and mineral fertilizer represents an effective strategy for enhancing crop yield. However, the relationship between soil fertility and crop yield remains unclear in saline-alkaline soil. Here, a 9-year field experiment (2015-2023) was conducted to investigate the effects of manure application and crop rotations on crop yield and economic efficiency as well as potential associated mechanisms in the Hetao Irrigation District. The results showed that in the third cropping rotation cycle, combined application of manure and mineral fertilizers (NPKO) caused a 6.2%, 38.9%, 65.3%, and 132.2% increase in wheat, sunflower, wheat equivalent yield, and the economic income of sunflower, respectively. The average grain yield had a positive correlation with soil organic matter and nutrient supply. This suggested that the soil organic matter had a positive effect on the crop yield due to its impact on nutrient supply. Simultaneously, the sunflower seed setting rate increased by 65.2% under NPKO. The linear regression model revealed that each additional input of 20 Mg ha of manure resulted in an increase of 3.56 kg ha in crop phosphorus harvest and a 0.05 Kg ha increase in wheat equivalent yield compared to NPK. In conclusion, our results highlighted that manure application promotes soil properties and improves crop yield.
有机肥与矿物肥料的联合施用是提高作物产量的有效策略。然而，在盐碱土中，土壤肥力与作物产量之间的关系仍不明确。在此，于2015年至2023年开展了一项为期9年的田间试验，以研究河套灌区施用有机肥和作物轮作对作物产量、经济效益以及潜在相关机制的影响。结果表明，在第三个作物轮作周期中，有机肥与矿物肥料（NPKO）联合施用使小麦、向日葵、小麦当量产量以及向日葵经济收入分别提高了6.2%、38.9%、65.3%和132.2%。平均粮食产量与土壤有机质和养分供应呈正相关。这表明土壤有机质因其对养分供应的影响而对作物产量产生积极作用。同时，在NPKO处理下向日葵结实率提高了65.2%。线性回归模型显示，与NPK相比，每额外投入20 Mg/ha的有机肥，作物磷收获量增加3.56 kg/ha，小麦当量产量增加0.05 Kg/ha。总之，我们的结果突出表明，施用有机肥可改善土壤性质并提高作物产量。
