Soil salinity variations and cotton growth under long-term mulched drip irrigation in saline-alkali land of arid oasis

Abstract The sustainable development and utilization of saline-alkali land are closely related to holding fast the minimum cultivated area China. change soil salt in cotton field under long-term mulched drip irrigation (MDI) is connected with national industry. From 2015 2019, five fields different applying years MDI, which were reclaimed 2004, 2008, 2010, 2012 respectively wasteland before, monitored continuously Manas River Xinjiang. By means continuous location monitoring spatial–temporal variability (For example, data MDI 2015, year counted as 12, 8, 6, 4 1 years, respectively), variations ions 1-16a technology presented. growth characteristics its main influencing factors also analyzed study. results showed that experienced changed from intensive saline moderate finally non-saline MDI. response divided into three typical stages. Firstly, desalinated rapidly 1-4a field, annual average desalination rate was 24.93% 0–100 cm layer (root zone). Additionally, survival rocketed 1.48% 42.04%, yield increased sharply 72.43 kg ha ?1 3075.90 . Soil lower 5-11a 10.92% at root zone. by 6.26% 5.18%, respectively. After 12a tended be generally constant, content zone less than 2.49 g stable above 90.39%, per unit exceeded 5401.32 Ions, sodium absorption ratio Cl ? SO 2? equivalent (CSER) decreased extension Salt composition year, but type had always been chloride-sulphate solonchak (0.2 < CSER 1). In practice, a higher quota ideal water quality, environment developed favor an oasis area. However, this management practice caused between 124.21–143.61 mm resources waste. Therefore, we should further enhanced consciousness water-saving implemented practice.