Effect of partial root-zone drying irrigation (PRDI) on alfalfa available soil P

IF 2.3 4区农林科学 Q1 AGRONOMY

Archives of Agronomy and Soil Science Pub Date : 2023-01-24 DOI:10.1080/03650340.2023.2169915

Jing Zhang, Huimin Liu, X. Wei, Z. Guo

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引用次数: 0

Abstract

ABSTRACT This study focused on alfalfa (Medicago sativa) to investigate the effect of partial root-zone drying irrigation (PRDI) on N-fixing crops available soil P. A three-year field experiment was designed with two irrigation methods and four irrigation volumes. Two irrigation methods consisted of PRDI and conventional furrow irrigation (CFI), and four irrigation volumes were set as 70% ETc (alfalfa water requirement), 85% ETc, 100% ETc and 115% ETc. This study showed that the PRDI had no effect on alfalfa seasonal forage yield but increased alfalfa P uptake. The PRDI decreased the soil available P content and stock but had no effect on the total P content and stock, which demonstrates that effect of PRDI on crop available soil P was different when different P forms were used to estimate crop available soil P. This study also showed that the variation in the coefficient was below 3% between soil P (available or total P) contents and soil P stocks, indicating that soil P contents and stocks were similar when estimating alfalfa available soil P under PRDI conditions. The findings of this study present a pattern of estimating the N-fixing crops available soil P in relation to PRDI.

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部分根区干燥灌溉(PRDI)对紫花苜蓿有效土磷的影响

摘要本研究以紫花苜蓿（Medicago sativa）为研究对象，研究了部分根区干旱灌溉（PRDI）对固氮作物有效土壤P的影响。设计了两种灌溉方式和四种灌溉量的三年田间试验。两种灌溉方式分别为PRDI和常规沟灌，四种灌溉量分别为70%ETc（苜蓿需水量）、85%ETc、100%ETc和115%ETc。PRDI降低了土壤有效磷含量和存量，但对总磷含量和储量没有影响，这表明当使用不同的磷形态来估计作物有效土壤磷时，PRDI对作物有效土壤P的影响是不同的，表明在PRDI条件下估算苜蓿有效土壤磷时，土壤磷含量和储量相似。本研究的结果提供了一种估算与PRDI相关的固氮作物有效土壤P的模式。

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来源期刊

Archives of Agronomy and Soil Science AGRONOMY-SOIL SCIENCE

CiteScore

5.50

自引率

4.20%

发文量

107

期刊介绍： rchives of Agronomy and Soil Science is a well-established journal that has been in publication for over fifty years. The Journal publishes papers over the entire range of agronomy and soil science. Manuscripts involved in developing and testing hypotheses to understand casual relationships in the following areas: plant nutrition fertilizers manure soil tillage soil biotechnology and ecophysiology amelioration irrigation and drainage plant production on arable and grass land agroclimatology landscape formation and environmental management in rural regions management of natural and created wetland ecosystems bio-geochemical processes soil-plant-microbe interactions and rhizosphere processes soil morphology, classification, monitoring, heterogeneity and scales reuse of waste waters and biosolids of agri-industrial origin in soil are especially encouraged. As well as original contributions, the Journal also publishes current reviews.