Manuscript Title:

EFFECTS OF LIME, COW MANURE AND IRRIGATION METHODS ON SOIL PROPERTIES, YIELD AND CADMIUM ACCUMULATION OF RICE JASMINE 85

Author:

NGUYEN VAN CHUONG

DOI Number:

DOI:10.17605/OSF.IO/6X3AD

Published : 2022-12-10

About the author(s)

1. NGUYEN VAN CHUONG - Department of Crop Science, Agricultural Faculty of An Giang University-Vietnam National University, Ho Chi Minh City, Viet Nam, 18 Ung Van Khiem St., Long Xuyen city, An Giang province, Vietnam.

Full Text : PDF

Abstract

Agricultural soils could enhance oxic conditions and lessen roving ability of Cadmium (Cd) and uptake into rice grains when utilizing Alternate wetting and drying irrigation (AWDI). However However, scant study is available uptake of Cd speciation and uptake at the experimental sites for AWD with different soil polluting diffences. It is hypothesised that as the soil drying increases, rice uptake and following accumulation of Cd in the grain will reduce. In this field research, soil properties, yield and Cd uptake of rice Jasmine were determined at the prior stage of experiment and harvest, under two continuously flooded (CF) and AWDI methods. The studied results presented that all nutrients properties of AWDI increased remarkably at harvest compared to CF. Cadmium contents of rice stems and grains in the cow manure (CM) amendment were lower than that of rice stems (10.6%) and grains (55.5%) in non CM application. Cadmium contents of rice stems and grains in AWDI were lower than that of rice stems (45.7%) and grains (38.2%) in CF. Similarly, Cd contents of rice stems and grains differed from three liming rates. without liming, the average Cd content of stems and grains obtained the maximum value (159 and 76.4 µg/kg, respectively), which were significantly higher 3.5 (stems) and 3.7 times (grains) than those of the 2.0 tCaCO3/ha. Three stems and grain Cd contents of 0.0, 1.5 and 2.0 tCaCO3/ha were 159, 74, 8, 45,1 µg/kg in stems and 76.4, 37,4 and 20.5 µg/kg in grains , respectively. The average rice yield of non-cow manure addition (5.67 t/ha) were lower 1.26 times than that of 10.0 t CM/ ha application (7.14 t/ha). However, the rice yield of the CF and AWDI treatments that was insignificantly different at 5% was 6.45 and 6.46 t/ha, respectively. Furthermore, There were sufficient differences in the rice yield among lime addition treatments of three rates (0.0, 1.5 and 2.0 tCaCO3/ha). Specifically, in the 2.0 tCaCO3 treatments, the average rice yield was 7.03 t/ha and higher than 1.22 times compared to non-lime amendment treatments (5.77 tons/ha). The following hight yield of 1.5 tCaCO3/ha was 6.65 t/ha. Therefore, application of Urea, P2O5, K2O (84.0, 51.0, 30 kg/ha) fertilizers and 2.0 tCaCO3, 10tCM per ha combined with AWDI needs to be introduced to tillers.


Keywords

Cadmium, AWDI, CF, lime, rice Jasmine 85.