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Estimating Grain Yield Based on BSW and SPAD at Grain Filling Stage in Double Rice Cropping System of China
- Source :
- International Journal of Agriculture and Biology. :889-894
- Publication Year :
- 2016
- Publisher :
- Friends Science Publishers, 2016.
-
Abstract
- It may be good to estimate rice yield based on root bleeding snap weight (BSW) and leaf soil plant analysis development (SPAD) at grain filling stages in southeast China. There were seven treatments: (N-butyl) thiophosphorictriamide (NBPT) applied at rates of 0.00, 0.50, 0.75, 1.00, 1.25, 1.50% with urea @ 135 kg N ha -1 and CK (no NBPT or urea). All treatments received 75 kg P2O5 ha -1 (superphosphate, P2O5 12%) and 150 kg K2O ha -1 (potassium sulfate, K2O 60%), and then all fertilizer and inhibitor were applied once as base fertilizer. At grain filling stage, both of early and late rice, root BSW and leaf SPAD readings were obtained and grain yield determined at harvesting. In addition, the relationship between BSW, SPAD and grain yield was established. The results showed that the grain yield of rice, root BSW and leaf SPAD were increased significantly in application of NBPT with urea. Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice; and increased by 8.4-33.0%, 7.9-75.0% and 4.4-19.5% in late rice. However, these decreased when NBPT was less or more than 1.00%. On the other hand, the relationship between BSW, SPAD at grain filling stage and grain yield could be fitted by two-variable linear equation (p
- Subjects :
- 0106 biological sciences
Yield (engineering)
04 agricultural and veterinary sciences
Grain filling
engineering.material
Biology
01 natural sciences
Potassium sulfate
chemistry.chemical_compound
Agronomy
chemistry
040103 agronomy & agriculture
engineering
Urea
0401 agriculture, forestry, and fisheries
Grain yield
Fertilizer
Cropping system
General Agricultural and Biological Sciences
010606 plant biology & botany
Subjects
Details
- ISSN :
- 18149596 and 15608530
- Database :
- OpenAIRE
- Journal :
- International Journal of Agriculture and Biology
- Accession number :
- edsair.doi...........e84cab531d11866f750464054e37cc00