Integrated crop management practices for maximizing grain yield of double-season rice crop

Abstract

Information on maximum grain yield and its attributes are limited for double-season rice crop grown under the subtropical environment. This study was conducted to examine key characteristics associated with high yielding double-season rice crop through a comparison between an integrated crop management (ICM) and farmers’ practice (FP). Field experiments were conducted in the early and late seasons in the subtropical environment of Wuxue County, Hubei Province, China in 2013 and 2014. On average, grain yield in ICM was 13.5% higher than that in FP. A maximum grain yield of 9.40 and 10.53 t ha−1 was achieved under ICM in the early- and late-season rice, respectively. Yield improvement of double-season rice with ICM was achieved with the combined effects of increased plant density and optimized nutrient management. Yield gain of ICM resulted from a combination of increases in sink size due to more panicle number per unit area and biomass production, further supported by the increased leaf area index, leaf area duration, radiation use efficiency, crop growth rate, and total nitrogen uptake compared with FP. Further enhancement in the yield potential of double-season rice should focus on increasing crop growth rate and biomass production through improved and integrated crop management practices.

Agronomic practices affect rice yield and nitrogen, phosphorus, and potassium accumulation, allocation and translocation

“…Our results confirm the findings of Wang et al. (), where enhanced yield through improved agronomic practices was generally realized by an increase in panicle numbers. Our results indicate that the multiplier effect from the use of multiple cultivation techniques (e.g., SHY) can improve grain yield.…”

“…Wang et al. () showed that integrated agronomic practices can achieve higher yields and use resources more efficiently than single‐factor agronomic practices. Under integrated agronomic practices, rice yield increased by more than 15%, and the agronomic utilization rate of N fertilizer increased by more than 50%, which shows far greater increases than the gains achieved from using single cultivation techniques (Peng et al., ).…”

High‐density planting with lower nitrogen application increased early rice production in a double‐season rice system

“…(), who stated that increasing planting density with a reduction in basal N rate and constant N top‐dressing at panicle initiation might benefit rice production and lead to a high grain yield. Improvement in nutrient management (such as those in Qin et al., ; Wang et al., ) supported higher crop growth rate (CGR) throughout the growing season and higher N uptake as well when compared with farming practices which would increase the risk of nutrient losses and cause environmental concerns. Crop growth rate during the vegetative and grain‐filling stages, AE, and PEP increased with seedling density increasing (Figure , ).…”

Integrated crop management (ICM) for increasing rice production in Barind area

“…This results were found because all favourable conditions received the field ICM practice. This result was supported by Wang et al (2017). The interaction of variety and different management practices had no significant influence on yield and yield components.…”