Abstract
The purpose of this study was to evaluate (a) the performance of two modern rice varieties (non-tolerant and tolerant for saline soils) under different fertilizer management options, and (b) assess the yield gap and income increase through proper crop and nutrient management at different levels of soil salinity. Experiments were carried out in moderate and high levels of soil salinity in West Java, Indonesia. A split plot design with three replications was used. The main plots included two rice varieties, Inpari-30 Ciherang sub1 and Inpari-34 (tolerant variety for saline soils), and subplots included eight fertilizer management treatments. Farmer participatory field trials were also established across three levels of soil salinity with four different rice varieties, Sidenuk, Inpari 30, Inpari 34, and Inpari 35, and a fertilizer package consisting of organic and inorganic fertilizers. Under low and moderate soil salinities, Sidenuk and Inpari 30 with recommended practice had higher productivity and economic benefit compared to the saline tolerant rice varieties, Inpari 34 and Inpari 35. However, under high soil salinity, the yields of Inpari 34 and Inpari 35 with recommended practice were 93% higher than farmers’ practice, representing an exploitable yield gap of 1.3 t ha−1 and benefit above fertilizer cost of USD 301 ha−1. The combination of tolerant varieties and improved nutrient management use for rice production can therefore be used as a strategy for improving farmers’ income and livelihoods in coastal areas of Indonesia.
Highlights
The Indonesian archipelago comprises 17,504 islands with a total land area of around 1.9 million [1]
The grain yield of Inpari 30 was significantly higher than Inpari 34, with mean grain yields exceeding 6 t ha−1 for some Inpari 30 treatments (Table 2; Figure 2), whereas the mean grain yields for Inpari 34 per treatment never exceeded 4.5 t ha−1
Inpari 30 was selected for improvement from “mega variety” Ciherang (IR18349-53-1-3-1-3/IR19661-131-3-1//IR19661-131-3-1-///IR64/////IR64), a widely grown Indonesian cultivar that was developed from multiple variety crosses, including IR64
Summary
The Indonesian archipelago comprises 17,504 islands with a total land area of around 1.9 million [1]. Indonesia has a coastline of about 108,000 km , and about two million people live in coastal areas with an elevation of between 0 m and 2 m above sea level [2]. A substantial proportion of these agricultural areas are within close proximity of the sea [2]. Indonesia’s vast coastal agroecological zones are vulnerable to the effects of climate change such as sea level rise [3,4] and require strategies for adaptation, of their rice-based systems [5]. An increase in sea level will pose a km
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
