Effects of Phosphorus Reduction Combined with Humic Acid on Growth and Phosphorus Absorption of Leymus chinensis

doi:10.11733/j.issn.1007-0435.2024.11.023

Acta Agrestia Sinica ›› 2024, Vol. 32 ›› Issue (11): 3539-3546.DOI: 10.11733/j.issn.1007-0435.2024.11.023

Effects of Phosphorus Reduction Combined with Humic Acid on Growth and Phosphorus Absorption of Leymus chinensis

ZHAO Ting-ting, HU Yu-tong^1,2, ZHANG Shao-min³, QIU Chun-chen¹, ZHOU Xiao-guo¹, GUO Liang¹, LIAO Yu¹, WANG Yong-bin⁴

1. Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China;
2. Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Urumqi, Xinjiang 830052, China;
3. Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Desert Oasis Crops Physiology, Ecology and Cultivation, Ministry of Agriculture and Rural Affairs, Urumqi, Xinjiang 830091, China;
4. Xinjiang Jin fang yuan Grassland Ecological Technology Development limited company, Hutubi, Xinjiang 831200, China

Received:2024-02-02 Revised:2024-04-02 Published:2024-11-29

减磷配施腐植酸对羊草生长及磷素吸收的影响

赵婷婷, 胡雨彤^1,2, 张少民³, 仇春辰¹, 周小国¹, 郭亮¹, 廖雨¹, 王永斌⁴

1. 新疆农业大学, 新疆乌鲁木齐 830052;
2. 新疆土壤与植物生态过程重点实验室, 新疆乌鲁木齐 830052;
3. 新疆农业科学院和技术生物技术研究所/农业农村部荒漠绿洲作物生理生态与耕作重点实验室, 新疆乌鲁木齐 830091;
4. 新疆锦芳园草原生态科技开发有限公司, 新疆呼图壁 831200

通讯作者: 胡雨彤,E-mail:hyt@xjau.edu.cn
作者简介:赵婷婷(1997-),女,汉族,陕西榆林人,硕士研究生,主要从事磷肥资源高效利用方向研究,E-mail:634810717@qq.com
基金资助:
新疆维吾尔自治区自然科学基金项目(2022D01A187)资助；新疆维吾尔自治区自然科学基金项目(2019D01B19)资助

Abstract

Abstract: To explore the effects of reducing phosphorus fertilizer while concurrently applying humic acid on the growth,photosynthetic characteristics,and phosphorus use efficiency of Leymus chinensis during jointing stage,this study set up experiments including a control (CK),conventional fertilization (100%P:P₂O₅140 kg·hm^-2),and reduced phosphorus fertilization by 10%,20%,and 30% with an additional 45 kg·hm^-2 humic acid on the basis of conventional fertilization (90%P+HA,80%P+HA,70%P+HA). Results showed that under the 80%P+HA treatment,plant height of L. chinensis reached a maximum of 64.93 cm,and biomass reached 1659.92 kg·hm^-2,a 34.80% increase compared to 100%P. Chlorophyll b and carotenoid content reached their maximum values under the 80%P+HA treatment,at 1.64 mg·g^-1 and 0.73 mg·g^-1 respectively,and net photosynthetic rate increased by 21.88% compared to CK. Phosphorus contents in L. chinensis reached its maximum under the 80%P+HA treatment,and phosphorus use efficiency increased by 110.87% compared to 100%P. These results indicate that reducing phosphorus and applying humic acid significantly affect biomass and phosphorus absorption and utilization in L. chinensis. In artificial planting of L. chinensis in Xinjiang,it is recommended to apply 112 kg·hm^-2 of phosphorus fertilizer with 45 kg·hm^-2 of humic acid to increase biomass,enhance leaf photosynthetic capacity,promote phosphorus absorption,improve phosphorus fertilizer utilization efficiency,and achieve the goal of “reducing phosphorus application while increasing efficiency of phosphorus fertilizer”.

Key words: Phosphorus, Humic acid, L. chinensis, Biomass, Photosynthesis, Nutrient absorption

摘要： 为探究减施磷肥同时配施腐植酸(Humic acid，HA)对羊草(Leymus chinensis)拔节期生长、光合特性及磷肥利用率的影响，本研究设置了空白对照(CK)、常规施肥(100%P：P₂O₅ 140 kg·hm^-2)以及常规施肥基础上减施10%，20%，30%磷肥并配施45 kg·hm^-2HA(90%P+HA，80%P+HA，70%P+HA)试验。结果显示：羊草拔节期80%P+HA处理下的株高达到最大值，为64.93 cm；生物量达到1659.92 kg·hm^-2，较100%P提高了34.80%；叶绿素b、类胡萝卜素含量在80%P+HA处理下达到最大值，分别为1.64 mg·g^-1，0.73 mg·g^-1，净光合速率相比CK提升21.88%；80%P+HA处理羊草磷含量达到最大值，磷肥利用率与100%P相比提高了110.87%。本研究结果表明减磷配施HA对羊草生物量和磷素吸收利用有显著影响，在新疆人工建植羊草推荐磷肥施用量为112 kg·hm^-2配施腐植酸45 kg·hm^-2有利于羊草生物量的增加，提高叶片光合能力，促进磷素的吸收和提高磷肥利用率，达到磷肥“减量增效”目的。

关键词: 磷素, 腐植酸, 羊草, 生物量, 光合作用, 养分吸收

CLC Number:

S543.9

ZHAO Ting-ting, HU Yu-tong, ZHANG Shao-min, QIU Chun-chen, ZHOU Xiao-guo, GUO Liang, LIAO Yu, WANG Yong-bin. Effects of Phosphorus Reduction Combined with Humic Acid on Growth and Phosphorus Absorption of Leymus chinensis[J]. Acta Agrestia Sinica, 2024, 32(11): 3539-3546.

赵婷婷, 胡雨彤, 张少民, 仇春辰, 周小国, 郭亮, 廖雨, 王永斌. 减磷配施腐植酸对羊草生长及磷素吸收的影响[J]. 草地学报, 2024, 32(11): 3539-3546.

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Effects of Phosphorus Reduction Combined with Humic Acid on Growth and Phosphorus Absorption of Leymus chinensis

减磷配施腐植酸对羊草生长及磷素吸收的影响

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