NGHIÊN CỨU ẢNH HƯỞNG CỦA BENTONITE ĐẾN KHẢ NĂNG TRAO ĐỔI CATION VÀ GIỮ ẨM ĐẤT CANH TÁC CÂY MĂNG TÂY TẠI TỈNH NINH THUẬN

Tóm tắt

Effects of bentonite on cation-exchange and moisture retaining capacities in the sandy soil of Ninh
Thuan province for asparagus cultivation were studied. It is well known that the Ninh Thuan’s sandy
soil is rather suitable for asparagus cultivation, meanwhile the water saving ability was not more than
10%. Evaluation of the moisture holding capacity was carried out using a tensiometer tool and nutrient
retention capacity of the soil was estimated by monitoring the N, P, and K content over time. The
experimental results showed that when 3% of bentonite was being mixed with the sandy soil the cationexchange capacity and crop yield were increased by 40% and 10%, respectively. Due to the ability to
retain moisture and nutrients, benthonite is supposed to be used for widespreading the method of
treatment of sandy soils as an advanced solution in agricultural production and alleviation of negative
impact of fertilizer residues.
Keywords: bentonite, cation-exchange capacity, asparagus, crop yield, moisture