Effect of Gluconacetobacter diazotrophicus inoculation and reduced nitrogen fertilizer on yield and growth parameters of rice varieties

IF 1.1 4区农林科学 Q3 AGRONOMY

Journal of Seed Science Pub Date : 2021-01-01 DOI:10.1590/2317-1545v43253229

T. Dung, Dongli Tan, Tran Huynh Khanh, D. Gale, Vu Van Long

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引用次数: 3

Abstract

Abstract: This study aimed to investigate effects of nitrogen (N) fertilizer rates and inoculation of rice seeds with N-fixing bacterium Gluconacetobacter diazotrophicus on the growth parameters and yield of OM5451 and OM6976 rice varieties in the Vietnamese Mekong Delta region. Nitrogen fertilizer rates of 50 kg N.ha-1 and 100 kg N.ha-1 were used, with latter reflecting farmer practice. Three rice seed inoculation methods were also employed: Seeds soaked in water for 24 hours and allowed to stand for 30 hours (control) (B0); Seeds soaked in water for 24 hours and inoculated with G. diazotrophicus for 30 hours (B1); Seeds soaked with G. diazotrophicus in water for 24 hours and allowed to stand for 30 hours. Applying 50 kg N.ha-1 without combining with NFB bacterium in this experiment generally resulted in less tillers, shorter plants, a lower SPAD index, and lower grain yield. Combining G. diazotrophicus bacterium with reduced N fertilizer of 50 kg N.ha-1 demonstrated rice growth and yield may be maintained in both varieties compared to 100 kg N.ha-1. These results providing a firm foundation for future research of adding NFB to paddy soils to decrease the N fertilizer requirement.

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接种重氮养糖醋杆菌和减氮肥对水稻产量和生长参数的影响

摘要/ Abstract摘要:本试验旨在研究氮肥施用量和接种固氮细菌重氮营养菌对越南湄公河三角洲地区水稻品种OM5451和OM6976生长参数和产量的影响。施氮量分别为50 kg N.ha-1和100 kg N.ha-1，后者反映了农民的实际情况。同时采用三种水稻种子接种方法:水浸泡24h，静置30h(对照)(B0);种子用水浸泡24小时，接种重氮营养菌30小时(B1);重氮营养菌浸水24小时，静置30小时。在本试验中，施用50 kg N.ha-1而不配NFB菌，一般会导致分蘖少、植株短、SPAD指数低、籽粒产量低。重氮营养菌配施50 kg N.ha-1的减量氮肥，与施用100 kg N.ha-1相比，两个品种均可保持水稻生长和产量。研究结果为今后水稻土中添加NFB降低氮肥需水量的研究奠定了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Seed Science Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

2.00

自引率

30.00%

发文量

审稿时长

12 weeks

期刊介绍： From 2017 the Journal of Seed Science (JSS) will circulate online version only. Original scientific studies and communications, not yet published or submitted to another journal for publication and written in Portuguese or English, will be accepted for publication. For manuscripts submitted in English, the authors should provide an adequated version. The SCIENTIFIC COMMUNICATION is a category of scientific manuscript which describes a technique, an equipment, new species or observations and surveys of limited results. It has the same scientific rigor as the “Scientific Articles” and the same value as a publication. The classification of a manuscript as a SCIENTIFIC COMMUNICATION is based on its content and scientific merit but it can be a preliminary study, simple and not definitive on a certain subject, with publication justified by its uniqueness and contribution to the area. The Editorial Board of the JSS may invite leading authors of recognized reputation to compose specific Review Articles covering topics of their specialization that will convey to the scientific community the state-of-the-art knowledge related to the specific theme.