| Water resources shortage was a serious probiem in Hebei Province,and the over exploitation of groundwater had a bad impact on the ecological environment,especially in the Heilonggang area,which seriously impedes the sustainable development of agriculture in this area.Therefore,it was necessary to carry out agricultural pressure mining measures,study reasonable water-saving planting modes,and select drought-resistant and water-saving varieties.In this study,under the background of the implementation of pressure harvesting measures for water-saving agriculture,the seasonal fallow technology and the matching irrigation technology for drought-resistant and water-saving winter wheat were studied through field experiments in Shenzhou Experimental Station of Academy of Agricultural and Forestry Sciences of Hebei Province,and the actual water-saving effects of the two pressure harvesting measures were evaluated based on the actual production.The main results were as follows:(1)Under the wheat/maize two-crop planting mode,Winter wheat under the premise of sufficient moisture seed,three varieties of Heng 4399,Hengguan 35 and Heng 4444 can be selected when planting drought-resistant and water-saving wheat varieties,The spring water-saving irrigation mode was selected according to the rainfall,When the rainfall during the growth period was greater than 130 mm,the spring 1 water irrigation mode can be selected,and the irrigation volume was 75 mm,when the rainfall was less than 130 mm,the spring irrigation 2 water mode can be selected,and the irrigation water volume was 150 mm,the best time to irrigate one water in spring was 5 to 15 days after jointing stage,when the yield was the higher and the irrigation water use efficiency was the higher.The water-saving effect of the matching irrigation technology for the drought-resistant and water-saving winter wheat varieties was good,the actual production of wheat also complies with the law of field experiments showing that as the amount of irrigation increases,the output increases within a certain range,but the output decreases with too much irrigation,due to the extensive irrigation mode,some villages planting drought-resistant and water-saving wheat varieties,it did not achieve the expected water saving effect.While implementing measures,technical guidance was urgently needed,so that auxiliary measures can be better implemented to achieve good groundwater compression mining results.(2)When the seasonal fallow policy was implemented,the stable-yield Denghai 605 variety can be used when maize was planted once a year,the planting density was selected according to the characteristics of different varieties to achieve the target yield.The irrigation system should be selected according to the annual situation,When the sowing date was late,the irrigation frequency should be reduced,The suitable sowing date was from early June to June 20,the output-to-investment ratio of the one-crop planting model was higher than that of two-cropping a year,which can save water and fertilizer.The water-saving effect of fallow measures in actual production was very good,The sowing dates for corn planting in the fallow pilot villages were generally earlier,Under the premise of the same irrigation amount,they were lower than the irrigation water use efficiency in the field experiment when the sowing dates were June 5 and June 20,Reasonable advice on planting should be given when the measures were implemented.In summary,this study had explored water-saving and high-yield planting model planting model of maize for one-year cropping and the spring water-saving irrigation model of drought-resistant and water-saving winter wheat varieties,which provides a theoretical basis for guiding water-saving cultivation practices.At the same time,in connection with actual production,scientifically evaluated the real water-saving effects of the two compression mining measures and the problems in the implementation of the measures,so as to provide more targeted suggestions for actual production. |
PDF Full Text Request