Effects of Humic Acid Water-soluble Fertilizer on Growth,Yield and Nutrient Content of Asparagus
Three treatments of sprayed humic acid water-soluble fertilizer(TF),fresh water(TW)and conventional fertilization without spra-ying(CK)were set up in a plot experiment to study the effects of spraying humic acid water-soluble fertilizer on the growth,yield,nutrient contents and economic benefits of asparagus.The results showed that TF was significantly superior to TW and CK in terms of the biological characteristics of asparagus stems(number of stems per plant,length,stem thickness and mass).TF increased significantly asparagus yield by 9.5%and 13.1%compared with TW and CK(P<0.05),respectively.TF significantly(P<0.05)increased the total flavonoids,sapo-nins and polysaccharides contents of asparagus shoots by 6.8%,2.9%and 15.1%,respectively,compared with CK.However,the amino acid content of asparagus shoots from the three treatments did not differ significantly(P>0.05).TF increased the net economic benefits of as-paragus by 9 966 and 12 552 yuan/hm2 compared with TW and CK,respectively.Therefore,spraying humic acid water-soluble fertilizer on asparagus is worth further popularization and application.
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