【摘要】 汾河三坝灌区咸水灌溉技术试验结果表明：先淡后咸灌水方式比先咸后淡灌水方式冬小麦、春玉米、棉花分别增产６６ ％ 、４２ ％ 、５２ ％ ，比单用咸水灌溉增产３９１ ％ 、７９ ％ 、２６３ ％ 。在淡水资源许可的情况下，应采用咸、淡水轮灌，并且尽可能保证苗期淡水灌溉。三种作物生育期的土壤含盐量、相对溶液浓度以先淡后咸的灌水方式对作物生长较为有利。更多还原

【Abstract】 An experiment of saline water irrigation technology is done in Sanba irrigation district(the middle part of Shanxi Province)of the Fenhe River.The results show that the yields of winter wheat,spring maize and cotton with the method of irrigating first by fresh water then by saline water are 6.6%,4.4% and 5.2% more than those with the method of irrigating first by saline water then by fresh water respectively,these yields are 39 1%,7.9% and 26.3% more than those irrigated only by saline water respectively.It is suggested that the rotation irrigation of saline and fresh water should be adopted,and that the crops should be irrigated with fresh water in their seedling stages as far as possible,the water resources permitting.As regards the salt contents in soil and relative concentrations of solution of the three crops during the period of the growth stages of the three crops mentioned above,the experiment study shows that the method of irrigating first by fresh water then by saline water is more beneficial.The quality of the saline water in this area(Sanba irrigation district,the middle,Shanxi):for medium ground water,mineralization is less than 1 g/L ,PH is 8.0;for shallow wells,the mineralization is 6.8 g/L,PH is 7.5.The experiment study lasted five years in 1980’s.更多还原