Effects Of New Liquid Soil Conditioner On The Growth And Yield Of Oil Sunflower

Lack of water resources,large amount of water for agricultural irrigation,low water use efficiency and soil salinization in many areas have been restricting the development of agriculture in the low plain areas of hebei province.Oil sunflower is one of the important water-saving crops because of its salt tolerance and drought resistance.Therefore,the research group conducted regional adaptability research on 11 varieties of oil sunflower in 2017,and selected the dominant varieties with high yield,low water consumption and strong adaptability.On this basis,in order to solve the difficulty,we grow in saline soil at the same time,further agricultural water saving,increase yield of canopy,and improve the efficiency of water use,the research chose a kind of water salt resistant organic acid liquid soil conditioner,against S675 canopy under different saline conditions for potted controlled trials,to preliminary explore the canopy and soil conditioner water salt stress response of the law on water canopy growth under salt stress,the influence of yield and water use efficiency;A field control experiment was conducted on three oil sunflower varieties,S667,S675 and S998,at the dry and water-saving agricultural experimental station of hebei academy of agriculture and forestry sciences to study the applicability of soil conditioner to different varieties of oil sunflower.Through the analysis and processing of oil sunflower growth index,yield and water consumption data,the main conclusions are as follows:(1)In the field experiment,the growth index,yield and water consumption of three varieties of oil sunflower were increased in varying degrees after applying the new liquid soil conditioner.Among them,the adaptability of S675 varieties in growth characteristics is relatively good,and S675 and S998 varieties in increasing yield and reducing water consumption is better.Therefore,S667 and S998 varieties of oil sunflower combined with soil conditioner can achieve the goal of high yield,low water consumption and high water use efficiency.(2)In pot planting experiment,the most sensitive to water demand is in the current stage of oil sunflower.The water consumption in each development period is as follows:the current stage,flowering period,maturity period,and the water consumption is related to the water deficit.The water consumption of moderate saline soil(NaCl content 0.3%)decreased during the whole development period after the application of new liquid soil conditioning agent.(3)Seed emergence time,seedling emergence rate,growth index and yield of oil sunflower were negatively correlated with salt content,that is,the higher the salt content,the lower the indexes were.When the salt content is 0.5%,the growth of oil sunflower will be bad,and when the salt content is lower than 0.3%,the growth indexes of oil sunflower will basically be normal.