Effects of application of rapeseed cake as organic fertilizer on rice quality at high yield level

Abstract

BACKGROUND Applying organic fertilizer coupled with chemical fertilizer has been widely adopted to improve crop productivity and quality and develop sustainable agriculture. However, little information is available about the effects of organic fertilizer on the grain quality of rice (Oryza sativa L.), especially nutritional quality and starch quality. In the present study, high yielding ‘super’ rice cultivars were grown in the field with three cultivation practices, including zero nitrogen application (0N), local high yielding practice with chemical fertilizer (T1) and T1 treatment with additional organic fertilizer (T2). RESULTS Application of organic fertilizer synergistically improved rice production, nitrogen use efficiency, milling and appearance quality, and nutritional quality, including the contents of glutelin, essential amino acids and microelements, and also increased amylopectin and the ratio of the short chain of amylopectin, leading to a reduction in relative crystallinity, and decreased prolamin content. Application of organic fertilizer also increased the viscosity and breakdown values, whereas it decreased the pasting temperature and gelatinization enthalpy, resulting in better cooking and eating quality. CONCLUSION Overall, application of organific fertilizer could synergistically improve nitrogen use efficiency and grain quality, including the structure and physicochemical properties of starch, contents of high value protein and amino acids, contents of microelements, and cooking and eating quality. © 2021 Society of Chemical Industry.

Determining optimal nitrogen management to improve rice yield, quality and nitrogen use efficiency based on multi‐index decision analysis method

“…The knowledge‐based N management practices can increase rice yield, 31,3,15 which is in line with the present study (Table 1). However, Moe et al 32 .…”

“…A recent study also showed that organic fertilizer substitution improved assimilate storage by increasing the photosynthetic capacity of leaves and stems (source) after flowering, which is conducive to their transport to grain (sink) and increase grain weight, and more conducive to its source–sink balance 21 . The application of organific fertilizer also could synergistically improve NUE and grain quality, including the structure and physicochemical properties of starch, contents of high value protein and amino acids, contents of microelements, and cooking and eating quality 15 . Although the importance of rice yield, quality and resource use efficiency has justifiably attracted much attention, little research have been focused on their comprehensive improvement.…”

Enzymes and microorganisms jointly promote the fermentation of rapeseed cake

“…Identified metabolites were annotated using the kyoto encyclopedia of genes and genomes (KEGG) Compound database 9 , and annotated metabolites were then mapped to the KEGG Pathway database. 10 Pathways with significantly regulated metabolites mapped to were then fed into MSEA (metabolite sets enrichment analysis), and their significance was determined by the hypergeometric test's p-values.…”

“…Rapeseed cake is also a traditional organic fertilizer widely used in crops, vegetables, fruit trees, etc. It has been shown that the application of rapeseed cake fertilizer in rice fields could increase the soil microbial population and improve the rice yield by regulating the nutrient retention and release process ( 7 – 9 ). Mixing rapeseed cake and inorganic fertilizer is beneficial to increasing corn plant biomass and improving crop productivity, soil fertility, and nutrient balance ( 10 , 11 ).…”

Amino Acids in Rice Grains and Their Regulation by Polyamines and Phytohormones

“…In 2017, there were 515 million people with chronic malnutrition due to the insufficient intake of amino acids around the world, and these people are mainly concentrated in developing countries and regions with rice (Oryza sativa L.) as their staple food [7,8]. Rice is one of the most important food crops in the world, and more than 50% of the world's population lives on rice [9][10][11]. Exploring regulatory ways to increase the content of amino acids, especially essential amino acids, in rice grains is an effective approach to meeting nutrition requirements for these populations.…”