Effects of water and fertilizer coupling on nutrient absorption and soil physicochemical properties of mini Chinese cabbage
The purpose of this study was to explore the scientific irrigation and fertilization system of water sav-ing,fertilizer saving,high yield and high efficiency of autumn crop mini Chinese cabbage in cold irrigation area of Hexi.The mini Chinese cabbage planted in autumn was the research object in the study.'Gold Queen'was used as a test material.The effects of three irrigation water volumes(H1,H2,H3)combined with three fertilizer amounts(F1,F2,F3)on nutrient absorption and soil physicochemical properties of mini Chinese cabbage under drip irri-gation were studied.The results showed that the amount of water and fertilizer was closely related to the soil physical and chemical properties and nutrient absorption.The medium water and fertilizer treatment improved the physical and chemical properties of the soil of mini Chinese cabbage field to a certain extent,maintained the soil acid-base balance,and increased the nutrient content of mini Chinese cabbage leaf ball as well as the accumulation of nutri-ent in the leaf ball.Under the coupling mode of water and fertilizer,the absorption of nitrogen,phosphorus and po-tassium in the leaf ball of H2F2 treatment was higher than that of H3F3 treatment by 4.72％,3.26％and 3.22％,respectively.The comprehensive score of water and fertilizer coupling effect obtained by using the membership func-tion of principal component combined with weight was the highest in H2F2 treatment,and 7.13％higher than that of high water and high fertilizer treatment,which was the optimal water and fertilizer combination in this experi-ment.Taking into account the soil's physical and chemical properties and nutrient absorption,an irrigation level of 70％field capacity combined with a fertilizer application of N 330-P2O5 195-K2O 450 kg·hm-2 represents the op-timal water and fertilizer management strategy for autumn mini Chinese cabbage in the cold irrigation areas of the Hexi Corridor.
Brassica pekinensiswater and fertilizer couplingnutrient absorptionsoil physicochemical properties
万方数据
维普
