Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (5): 859-867.DOI: 10.3969/j.issn.1000-2561.2020.05.003

• Crop Culture and Nutrition, Genetic Breeding • Previous Articles     Next Articles

Yield, Nitrogen and Phosphorus Nutrient Effects of Alginate Compound Fertilizer on Double-cropping Rice

HUANG Jichuan,PENG Zhiping(),TU Yuting,WU Xuena,LIANG Zhixiong,YANG Linxiang,LIN Zhijun   

  1. Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences / Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation / Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs, Guangzhou, Guangdong 510640, China
  • Received:2019-07-19 Revised:2019-09-01 Online:2020-05-25 Published:2020-06-15
  • Contact: PENG Zhiping


A field experiment of double-cropping rice in south China was investigated. Five treatments were designed as follows: 1) no fertilization (CK); 2) conventional compound fertilizer (CCF); 3) alginate compound fertilizer (ACF); 4) 80% conventional compound fertilizer (80% CCF); 5) 80% alginate compound fertilizer (80% ACF). The effects of reduction application of alginate compound fertilizer on yield, nutrient uptake by rice and residue in soil as well as soil bioactivity of double-cropping rice were studied. Alginate compound fertilizer could increase the rice effective panicle and grain yield. The effective panicle of ACF treatment increased significantly by 14.5% (late rice), grain yield increased significantly by 7.6% (early rice) and 5.1% (late rice) compared to CCF. There was no significant difference of grain yield between 80% ACF and CCF treatment. Alginate compound fertilizer could improve the partial factor productivity of nitrogen and phosphorus fertilizer. Under reduced fertilization condition, the partial factor productivity of nitrogen and phosphorus fertilizer increased by 6.1-8.5 and 15.2-21.4 kg/kg, respectively, nitrogen and phosphorus uptake efficiency increased by 11.3-19.7 and 12.0-19.8 percentage points, respectively, and 80% ACF showed the highest value. Reduced fertilization significantly decreased the content of NO3 --N in the 20-40 cm soil layer. Alginate compound fertilizer could increase soil microbial biomass carbon (nitrogen) and soil sucrase, urease and acid phosphatase activities compared to the conventional compound fertilizer. Principal component analysis showed that the comprehensive score of soil fertility was 80% ACF>ACF>CCF>80% CCF>CK. This study showed that 80% ACF treatment could maintain rice yield compared with CCF under double-cropping rice in south China. However, the balance of nitrogen and phosphorus in soil was deficient after one year of double cropping rice planted. It is suggested that reducing fertilization measures should be formulated according to the soil fertility status and target yield in order to maintain the sustainability of soil fertility.

Key words: double-cropping rice, compound fertilizer containing alginate acid, fertilizer efficiency, yield, microbial biomass carbon (nitrogen), soil enzyme activity

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