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Sustainability of Rice Cultivation System: Management Practices and Market Opportunities—Volume...
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Sustainability of Rice Cultivation System: Management Practices and Market Opportunities—Volume II

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Innovative Cropping Systems".

Deadline for manuscript submissions: closed (15 March 2024) | Viewed by 2523

Special Issue Editor

Dr. Jing Xiang

E-Mail Website
Guest Editor
State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China
Interests: rice; mechanized cultivation; root; nutrient management; physiology; water irrigation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleague,

Rice (Oryza sativa L.) is one of the most important crops grown worldwide and is the staple food of over half of the world’s population. High rice production can be sustained in two ways: by expansion of cultivation area and increase in land productivity. Achieving high rice production requires an increase in water resources, fertilizer input, pesticide applications, and so on. However, those crop intensification processes have led to environmental pollution, soil fertility degradation, and crop yield reduction. Thus, it is imperative that efforts be made to increase rice-based cropping system productivity and alleviate the deleterious crop intensification processes by improving management practices.

This Special Issue of Agronomy aims to publish the latest research progress on management practices to enhance the sustainability of rice cultivation systems. For this Special Issue, we welcome investigators to contribute original research articles and review papers.

Dr. Jing Xiang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rice cultivation
  • sustainability
  • management mode
  • soil fertility
  • nitrogen
  • irrigation
  • productivity

Published Papers (2 papers)

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Research

17 pages, 3780 KiB  
Article
Integrated Straw Return with Less Power Puddling Improves Soil Fertility and Rice Yield in China’s Cold Regions
by Donghui Liu, Pengfei Li, Wenyu Wu, Shunyao Yu, Muhammad Rehman Naseer, Zhilei Liu, Cailian Yu and Xianlong Peng
Agronomy 2024, 14(4), 685; https://doi.org/10.3390/agronomy14040685 - 27 Mar 2024
Viewed by 840
Abstract
The rice production system in China is facing challenges, including declining soil fertility and a stagnant rice yield. This study aimed to test whether integrating the return of straw to fields with less power puddling could simultaneously enhance soil fertility and rice yields. [...] Read more.
The rice production system in China is facing challenges, including declining soil fertility and a stagnant rice yield. This study aimed to test whether integrating the return of straw to fields with less power puddling could simultaneously enhance soil fertility and rice yields. Therefore, field experiments were conducted in Heilongjiang Province, a key rice-growing region in China, from 2017 to 2021, using three different planting methods: control group (CK), straw return (SR) and straw return integrated with less power puddling (SR + LP). The results showed that small soil aggregates (particle diameter < 0.25 mm) and soil bulk density were significantly decreased when straw return was integrated with less power puddling. These changes contributed to the preservation of soil structure. Simultaneously, this approach significantly increased soil ammonium nitrogen content from 9.9 to 10.9 mg kg−1, organic matter content from 35.0 to 36.2 g kg−1, available nitrogen content from 140.5 to 147.0 mg kg−1 and available potassium content from 128.6 to 136.8 mg kg−1 at mature stage on average. Consequently, the post-heading stored assimilates accumulation of rice was increased from 6.12 to 6.43 t ha−1, and the nitrogen, phosphorus and potassium accumulation of rice were increased by 7.85 kg ha−1, 1.13 kg ha−1 and 5.68 kg ha−1, respectively. These changes ultimately resulted in a higher 1000 g weight and filled grain rate, providing the foundation for higher yields (an increase from 9.31 t ha−1 to 9.55 t ha−1). Furthermore, this approach also increased the net income for farmers by USD 14 t ha−1. In summary, this study demonstrates that integrating straw return with less power puddling can enhance soil’s nutrient supply and retention capacity. This enhancement may boost the absorption and transportation of nutrients, ultimately establishing the groundwork for higher yields and economic benefits by enhancing the 1000 g weight and filled grain rate. Future research should delve deeper into its applicability across different ecosystems and investigate the yield-increasing mechanisms. Full article
(This article belongs to the Special Issue Sustainability of Rice Cultivation System: Management Practices and Market Opportunities—Volume II)
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16 pages, 5555 KiB  
Article
Physiological Characteristics of Root Regeneration in Rice Seedlings
by Yizhuo Gao, Yan Zhu, Yuping Zhang, Yikai Zhang, Yaliang Wang, Zhigang Wang, Huizhe Chen, Yunbo Zhang and Jing Xiang
Agronomy 2023, 13(7), 1772; https://doi.org/10.3390/agronomy13071772 - 29 Jun 2023
Cited by 2 | Viewed by 1397
Abstract
The rapid development of new roots in transplanted rice (Oryza sativa L.) is crucial for shortening the returning green time of seedlings and accelerating tillering. Root regeneration plays an important role in enabling seedlings to resume normal growth and produce effective spikes [...] Read more.
The rapid development of new roots in transplanted rice (Oryza sativa L.) is crucial for shortening the returning green time of seedlings and accelerating tillering. Root regeneration plays an important role in enabling seedlings to resume normal growth and produce effective spikes after root injury. This study aimed to investigate the dynamic changes in new root production and the growth of seedlings of different varieties after root cutting in addition to the key physiological factors. We utilized hydroponics to set up four different time treatments to observe the occurrence of root systems in various rice seedling varieties after root cutting; we also measured related physiological indexes to further analyze the results. This study found that changes in aboveground nutrient, energy, and hormone levels in seedlings are critical for the growth of new roots after cutting. A morphological analysis showed that the root germination force of Zhongzao 39 (ZZ39) was stronger than Jiazao 311 (JZ311) before shearing and weaker after shearing. Physiological and biochemical analyses revealed that both ZZ39 and JZ311 experienced a decrease in their aboveground nitrogen and phosphorus content after root cutting. Soluble sugar content and starch content were found to decrease to their lowest levels after two days of root shearing. Furthermore, both varieties showed a significant increase in aboveground indole-3-acetic acid (IAA) content after two days of root shearing, and the IAA content in new roots was also higher. The results indicate that higher levels of hormones in seedlings with cut roots can enhance the transportation of nutrients and carbohydrates from the stems and leaves to the roots, leading to improved growth and the production of new roots. Additionally, the accumulation of IAA in damaged roots can also positively impact this process. This study found significant differences in the regeneration of rice seedling roots after cutting depending on the variety. We identified key physiological characteristics that affect new root generation, which provides a scientific basis for identifying strong root regeneration varieties and developing cultivation measures to promote new root growth in rice. Full article
(This article belongs to the Special Issue Sustainability of Rice Cultivation System: Management Practices and Market Opportunities—Volume II)
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