XÁC ĐỊNH LƯỢNG BÓN PHÂN KHOÁNG PHÙ HỢP THEO MỤC TIÊU NĂNG SUẤT CHO CÂY KHOAI TÂY (SOLANUM TUBEROSUM L.) TẠI THANH HÓA

Abstract

A field trial model (2.0 hectars) applying water and nutrient management technology of Israel in potatoes production was implemented on alluvial soil of Ma river, Winter-Spring crop 2018-2019 in Thanh Hoa province with 4 treatments of applying N, P2O5, K2O, Cao, MgO according to the target yield of 100%; 125%; 150% and 175%, compared to the average yield under farmers' production conditions. The amount of fertilizer and fertigation schedule was determined by the “Haifa Nutri-net” nutrition management software. The results showed that, the efficiency of potato production was highest at 175%: the total cost of production was 108.4 million VND/ha; the yield was 38.9 tons/ha; the total income was 238.8 million VND/ha; the net income was 165.5 million VND/ha; the net profit was 130.4 million VND/ha; the value cost ratio was 4,8. The economic optimum dose of fertilizers for potatoes based on applying water and nutrient management technology of Israel was 880 kg/ha (207N; 177 P2O5; 140 K2O; 24 CaO; 32 MgO), corresponding to the target yield 48 tons/ha.
Keywords: Potato, drip Fertigation, nutrinet software, effective production of potatoes.