|Table of Contents|

Tomato Root Increased Nitrogen Utilization Rate by Secreting Methionine in Nitrogen Reduction Associated Mode

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2025年9
Page:
44-54
Research Field:
Publishing date:

Info

Title:
Tomato Root Increased Nitrogen Utilization Rate by Secreting Methionine in Nitrogen Reduction Associated Mode
Author(s):
ZHOU Haonan; LIU Deyang; LANG Yishan; ZHAI Pengzhan; BAO Yiyan; WU Xia
(College of Horticulture and Landscape Architecture,Bayi Agricultural University,Daqing,Heilongjiang 163000)
Keywords:
biochar; stable production efficiency; effective nitrogen content; nitrogen use efficiency; pepper
PACS:
S 641.2
DOI:
10.11937/bfyy.20243971
Abstract:
Taking ‘Dongnong 708’ tomato as the test material,using the method of greenhouse pot,the tomato soil of continuous cultivation for 4 years was taken.There were 6 treatments,single cropping with no nitrogen fertilizer control (CK1),associated tillering onion with no nitrogen fertilizer control (CK2),single cropping with 30% nitrogen reduction (T1),associated tillering onion with 30% nitrogen reduction (T2),single cropping with conventional nitrogen application (T3),and associated tillering onion with conventional nitrogen application (T4).The effects of different fertilization levels on root exudates and nitrogen uptake and utilization of tomato rhizosphere soil were studied,in order to provide reference for screen the cultivation model and internal mechanism of efficient utilization of nitrogen fertilizer.The results showed that soil urease activity,soil protease activity,soil dehydrogenase activity and soil sucrase activity in nitrogen reduction groups T1 and T2 were significantly increased compared with CK group without nitrogen application and T3 and T4 group with conventional nitrogen application.The nitrogen use efficiency of T1 and T2 treatments was 63.59%，28.48% and 78.24%，57.25% higher than that of T3 and T4 treatments,respectively.The root secretion analysis results showed that the methionine content of tomato root secretion significantly increased in the cultivation mode of onion with tillers accompanied by a 30% reduction in nitrogen fertilizer application.The tile-back verification experiment confirmed that the growth promotion effect of tomato was more significant with the increase of methionine concentration in the range of 50 mmol·L-1 to 400 mmol·L-1.In summary,the cultivation mode of onion with 30% nitrogen reduction and associated tiller was conducive to improving the activity of enzymes related to nitrogen conversion in soil,thus improving the absorption and utilization of nitrogen fertilizer by tomato.The nitrogen content and biomass of tomato are significantly increased by increasing the secretion of methionine by root system.

References:

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Last Update: 2025-05-16