山西农业大学学报（自然科学版）2024，Vol.44Issue(3)：59-65,7.DOI:10.13842/j.cnki.issn1671-8151.202311004
番茄苗期根际加温对其生长及水分吸收的影响
Effects of root zone heating on growth and water consumption of tomato seedlings
摘要
Abstract
[Objective]In the northern winter or early spring greenhouse vegetable cultivation,low temperature environments such as late frosts often affect the growth and development of vegetables.Root zone temperature(RZT)is one of the important factors affecting tomato growth,especially in soilless cultivation systems where it is greatly affected by the environment.This study aimed to clarify the appropriate root zone heating temperature for tomato seedlings and provide theoretical and method-ological support for regulating RZT in early spring glass greenhouses in the northern regions,alleviating the damage caused by low temperature to tomato growth.[Methods]Under the conditions of elevated rockwool cultivation in a glass greenhouse,root zone heating was applied to tomatoes using a temperature-controlled heating belt.Three treatments were set:no root zone heat-ing(CK),root zone heating to 20℃(T20),and root zone heating to 25℃(T25).The effects of different root zone heating conditions on the growth,photosynthesis,dry matter accumulation,and water consumption of early spring tomato seedlings were studied.[Results]The results indicated that root zone heating significantly promoted the increase in tomato plant height,stem diameter,and leaf number.Compared with CK treatment,the T20 treatment increased plant height by 13.6%to 17.0%,stem diameter by 10.3%to 14.3%,and leaf number by 3.4%to 12.5%at different stages.The T25 treatment in-creased plant height by 7.2%to 9.7%,stem diameter by 7.7%to 15.6%,and leaf number by 0%to 15.6%compared with CK.Ten days after planting,the net photosynthetic rate of tomatoes increased and then decreased with increasing root zone temperature,while 20 and 30 days after planting,the net photosynthetic rate increased with increasing root zone temperature.Root zone heating promoted water absorption by tomatoes,promoted stem and leaf dry matter accumulation,and accelerated flowering.The T20 treatment increased aboveground dry weight by 79.3%to 85.4%compared with CK and accelerated flow-ering by 5 days.The T25 treatment increased aboveground dry weight by 29.2%to 72.4%and accelerated flowering by 3 days.[Conclusion]The T20 treatment resulted in the greatest plant height and stem diameter,the highest total accumulation of dry matter,and the earliest flowering time,indicating that 20℃is the most suitable root zone heating temperature for early spring tomato seedlings.关键词
番茄/根际加温/生长/光合/地上部干重Key words
Tomato/Root zone heating/Growth/Photosynthesis/Shoot dry weight分类
农业科技引用本文复制引用
孙茜,徐凡,王湛,郭文忠,王朝军,李灵芝..番茄苗期根际加温对其生长及水分吸收的影响[J].山西农业大学学报（自然科学版）,2024,44(3):59-65,7.基金项目
宁夏回族自治区重点研发计划项目(2022BBF02023) （2022BBF02023）
北京市农林科学院青年科研基金项目(QNJJ202307) （QNJJ202307）
国家自然科学基金项目(31601794) （31601794）
农业物联网技术北京市工程实验室(PT2023-29) （PT2023-29）
