摘要
Abstract
To investigate the effects of different ratios of organic fertilizer substituting chemical fertilizer in saline soil improvement areas on rice yield and soil fertility,a field experiment was conducted using the rice variety Songzaoxiang No.1.Five organic fertilizer substitution treatments were established:T1,100%chemical fertilizer;T2,25%organic fertilizer+75%chemical fertilizer;T3,50%organic fertilizer+50%chemical fertilizer;T4,75%organic fertilizer+25%chemical fertilizer;and T5,100%organic fertilizer.Rice yield and soil physicochemical properties were measured across treatments.The results showed that the T3 treatment achieved relatively high values in effective panicle number,grains per panicle,seed-setting rate,and 1 000-grain weight,at 3.128×106 panicles/hm2,142.5 grains,86.3%,and 26.8 g,respectively.The highest grain yield was also observed in T3(9.6 t/hm2),which was 12.9%higher than that of T1.In terms of soil physicochemical properties,with the increase in the organic fertilizer substitution ratio,soil pH,total porosity,organic matter,available phosphorus,and available potassium all showed increasing trends,while bulk density exhibited a decreasing trend.The available nitrogen content was highest in the T4 treatment.In summary,an organic fertilizer substitution ratio of 50%is recommended for rice production in this region.This paper provides a reference for reducing chemical fertilizer application while increasing efficiency in rice production.关键词
水稻/有机肥/化肥/土壤肥力/盐渍土改良区Key words
rice/organic fertilizer/chemical fertilizer/soil fertility/saline soil improvement areas分类
农业科技
