Response Of Lycium Barbarum-soil And Its Supporting Measures To Irrigated With Brackish Water And Micro-fertilizer

In response to the decrease in water diversion from the Yellow River in the Hetao Irrigation District of Inner Mongolia,the shortage of fresh water resources,and the serious pollution of agricultural non-point sources,the development of different brackish water irrigation and the combined application of trace element fertilizers(molybdenum fertilizer and iron fertilizer)on the growth and yield of medlar,seek suitable The brackish water-micro-fertilizer optimized coupling mode of local wolfberry planting,combined with advanced cultivation technology to integrate a set of technical modes,and conduct demonstration tracking and benefit evaluation of the integrated technical mode,and finally save fresh water,rationally use brackish water,and ensure crops The purpose of not damaging the water and soil environment of farmland.The main conclusions are as follows:(1)Influence on soil water and salt: The soil moisture content in the 0～60cm soil layer changes drastically,which is mainly caused by water absorption by the root system,while the soil moisture content in the 60～100 soil layer is relatively stable.The soil moisture content increases with the increase of irrigation volume.The initial salinity of each treatment was relatively high,and it changed regularly with time.The change was small in the early stage,and the difference gradually increased as the growth period passed.As the amount of brackish water irrigation increases,soil salinity rises,and the soil layer where soil conductivity appears deepens.The conductivity of each treatment W3(80mm)> W2(70mm)> W1(60mm)> CK(local planting),the soil conductivity continued to rise from the end of the growth period to before autumn watering.(2)Effect on the growth and yield of wolfberry: The growth and growth rate of each index of wolfberry growth showed an inverted "V" shape with the increase of irrigation volume,and the turning point was W2(70mm irrigation volume).Under the same irrigation amount,the mixed spraying of molybdenum fertilizer and iron fertilizer can significantly improve the growth indexes of Lycium barbarum plants.CKM1F1(local irrigation + mixed application of molybdenum fertilizer and iron fertilizer)has the highest yield,and W2M1F1 is the highest yield treatment in brackish water irrigation,which is only 5% lower than CKM1F1.Irrigation with brackish water exceeding 70 mm will reduce the yield of fresh wolfberry fruits.The 100-seed weight of fresh fruit of each treatment varied from 53.46 to 66.78 g,and brackish water irrigation would reduce the weight of100-seed fresh fruit of wolfberry.The lycium barbarum treated with micro-fertilizer was0.88%-20.11% higher than that without micro-fertilizer,and the micro-fertilizer could increase the 100-seed weight of lycium barbarum.(3)Evaluation of integrated technology effect: The soil moisture content during the whole growth period of local planting is 2% lower than that of integrated mode.The soil conductivity is 7% higher than that of the integrated model.The plant height,ground diameter,new branches,crown width,and yield of Lycium barbarum under the integrated mode were 8.00%,14.73%,7.36%,33.3%,and 8.22% higher than those in the local area,respectively.Compared with the local conventional planting model,the investment in the integrated model increased by 24.87%,the total income increased by 41.43%,and the input-output ratio was 1:2.068,which improved the economic benefits of the local wolfberry business.In summary,the integrated mode of W2 irrigation volume(70mm)and mixed irrigation of molybdenum and iron fertilizers is more suitable for the planting of wolfberry in the Hetao irrigation area,and can achieve the goal of increasing local wolfberry production while conserving freshwater resources.