| The traditional drip irrigation often drive out the soil gas,and will cause a hypoxia environment in root zone for a short time.As a new high-efficiency irrigation technology,aerated irrigation could solve the anoxic problem,and now there are a large number of research about it.But there are few studies on the crop growth,physiology,water and nutrient uptake under aerated irrigation in different soils.So we studied on growth,physiology,quality,water and nutrient uptake of strawberry or pakchoi in greenhouse under aerated irrigation(include cycle aerated irrigation and post-irrigation aeration treaments)in different soils(include clay of Zhengzhou,loam of Nanyang,silty loam of Luoyang and sandy loam of Zhu madian)according to theoretical analysis and trial.It is of great significance to promote the development of water-saving agriculture technology.Concluded were listed as follows:(1)Compared with control treatments in the experiment of potted strawberry,the crop growth and physiological parameters in aerated groups were increased by 18.2%-25.3% for plant height,17.8%-48.0% for root length,23.6%-40.2% for root activity,13.4%-20.4% for net photosynthetic rate,5.6%-26.4% for transpiration rate,and the indexes have significant difference.The aerated irrigation could significantly improve the crop and root growth of strawberry in the clay soil.In the potted pakchoi experiment,the plant height and leaf area of pakchoi were significantly increased in aerated groups,and all reach a maximum in post-irrigation aeration treatments.The cycle aerated irrigation treatments have the most obvious effect on dry-matter accumulation of pakchoi in sandy loam soil,the post-irrigation aeration treatments with the best improvement effect on pakchoi growth in clay soil,and the two kinds of aerated irrigation treatments all significantly increased the photosynthesis of pakchoi in yellow clay soil.(2)Cycle aerated drip irrigation could promote water uptake of strawberry root in all the four soils,and the sorting of total water consumption is clay>loam>silty loam>sandy loam.At last,the yield and quality of strawberry were all increased,the soluble solids of strawberrywere increased by 18.7% and 17.3% in the clay soil and silty loam soil,respectively.But there was no significant difference between the sandy loam soil and loam soil.Significant differences were found in VC content between the aerated and control treatments in all the four soils.Compared with control treatments,the water and nutrient uptake of pakchoi in aerated groups were increased significantly.In cycle aerated irrigation treatments,water use efficiency achieves maximum in the sandy loam soil,and increased by 16.4%.In post-irrigation aeration treatments,it achieves maximum in the clay soil,and increased by86.77%.In cycle aerated irrigation treatments,total N and total P absorption all reach maximum in the sandy loam soil,total K absorption reach maximum in the silty loam soil.In post-irrigation aeration treatments,total N absorption reach maximum in the clay soil,total P absorption reach maximum in the sandy loam soil,total K absorption reach maximum in the silty loam soil.Meanwhile,the nutrient uptake efficiency of pakchoi were significantly improved under aerated irrigation in different soils.(3)The comprehensive evaluation method that combined the subjective weighting method and the entropy information method was used to evaluate the comprehensive benefit of aerated drip irrigation on crop growth under different soil condition.The results showed that compared with control treatments,in the cycle aerated groups,the comprehensive benefit of strawberry in the clay soil was the best,in the silty loam soil was the worst.In cycle aerated irrigation treatments,the comprehensive benefit of pakchoi reach maximum in the clay soil.In post-irrigation aeration treatments,the comprehensive benefit of pakchoi in the sandy loam soil was the best in all treatments. |
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