Effect of biochar rates on A-mycorrhizal fungi performance and maize plant growth, Phosphorus uptake, and soil P availability under calcareous soil conditions

Phosphorus (P) is an important nutrient required for plant growth and its management in soil is critical to ensure sustainable and profitable agriculture that has minimal impact on the environment. Although soils may contain a large amount of total P, only a small proportion is immediately available to plants. Australian soils often have low availability of P for plant growth and P-based fertilisers are, therefore, commonly used to correct P deficiency and to maintain productivity. For many soils, the sustained use of P fertiliser has resulted in an accumulation of total P, a proportion of which is in forms that are poorly available to most plants. The efficiency with which different P fertilisers are used in agricultural systems depends on their capacity to supply P in a soluble form that is available for plant uptake (i.e. as orthophosphate anions). In addition to fertiliser source, the availability of P in soil is influenced to a large extent by physico-chemical and biological properties of the soil. Plant access to soil P is further affected by root characteristics (e.g. rate of growth, specific root length, and density and length of root hairs) and biochemical processes that occur at the soil–root interface. The ability of roots to effectively explore soil, the release of exudates (e.g. organic anions and phosphatases) from roots that influence soil P availability, and the association of roots with soil microorganisms such as mycorrhizal fungi are particularly important. These processes occur as a natural response of plants to P deficiency and, through better understanding, may provide opportunities for improving plant access to soil and fertiliser P in conventional and organic agricultural systems.

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Soil P availability, inorganic P fractions and yield effect in a calcareous soil with plastic-film-mulched spring wheat

Field Crops Research ◽

10.1016/j.fcr.2012.08.014 ◽

2012 ◽

Vol 137 ◽

pp. 221-229 ◽

Cited By ~ 11

Author(s):

Bin Hu ◽

Yu Jia ◽

Zhi-hong Zhao ◽

Feng-min Li ◽

Kadambot H.M. Siddique

Keyword(s):

Spring Wheat ◽

Calcareous Soil ◽

P Availability ◽

Plastic Film ◽

P Fractions ◽

Inorganic P ◽

Soil P ◽

Soil P Availability ◽

Inorganic P Fractions

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Phosphorus regulates ecosystem carbon dynamics after permafrost thaw

10.5194/egusphere-egu21-376 ◽

2021 ◽

Author(s):

Yuanhe Yang ◽

Guibiao Yang ◽

Yunfeng Peng ◽

Benjamin W. Abbott ◽

Christina Biasi ◽

...

Keyword(s):

Plant Growth ◽

N Availability ◽

P Availability ◽

Fertilization Experiment ◽

Soil P ◽

Soil P Availability ◽

Permafrost Thaw ◽

Ecosystem Carbon ◽

C Cycle

The ecosystem carbon (C) dynamics after permafrost thaw depends on more than just climate change since soil nutrient status may also impact ecosystem C balance. It has been advocated that the potential nitrogen (N) release upon permafrost thaw could promote plant growth and thus offset soil C loss. However, compared with the widely accepted C-N interactions, little is known about the potential role of soil phosphorus (P) availability. Here we combined two-year field observations along a permafrost thaw sequence (constituted by four thaw stages, i.e., non-collapse and 5, 14, and 22 years since collapse) with an in-situ fertilization experiment (included N and P additions at the level of 10 g N m-2 yr-1 and 10 g P m-2 yr-1, respectively) in a Tibetan swamp meadow to evaluate ecosystem C-nutrient interactions upon permafrost thaw. Our results showed that changes in soil P availability rather than N availability played an important role in regulating the increases in gross primary productivity and the decreases in net ecosystem exchange along the thaw sequence. The fertilization experiment further confirmed that P addition had stronger effects on plant growth than N addition in this permafrost ecosystem. These two lines of evidence highlight the crucial role of soil P availability in altering the trajectory of permafrost C cycle under climate warming.

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The Impact of Phosphorus on Plant Immunity

Plant and Cell Physiology ◽

10.1093/pcp/pcaa168 ◽

2021 ◽

Author(s):

Ching Chan ◽

Ya-Yun Liao ◽

Tzyy-Jen Chiou

Keyword(s):

Plant Growth ◽

Immune Responses ◽

Plant Immunity ◽

Biotic Interactions ◽

P Availability ◽

Phosphate Transporters ◽

Soil P ◽

Soil P Availability ◽

The Impact ◽

Significant Attention

Abstract Phosphorus (P) is the second most essential macronutrient in terms of limiting plant growth. The genes involved in P acquisition, transport, storage, utilization and respective regulation have been extensively studied. In addition, significant attention has been given to the crosstalk between P and other environmental stresses. In this review, we summarize recent discoveries pertaining to the emerging function of P in plant immunity. The roles of external soil P availability, internal cellular P in plants, P starvation signaling machinery and phosphate transporters in biotic interactions are discussed. We also highlight the impact of several phytohormones on the signaling convergence between cellular P and immune responses. This information may serve as a foundation for dissecting the molecular interaction between nutrient responses and plant immunity.

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Decreases in soil P availability are associated with soil organic P declines following forest conversion in subtropical China

CATENA ◽

10.1016/j.catena.2021.105459 ◽

2021 ◽

Vol 205 ◽

pp. 105459

Author(s):

Liuming Yang ◽

Zhijie Yang ◽

Xiaojian Zhong ◽

Chao Xu ◽

Yanyu Lin ◽

...

Keyword(s):

Forest Conversion ◽

P Availability ◽

Organic P ◽

Subtropical China ◽

Soil P ◽

Soil P Availability

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Organic material with balanced C‐nutrient stoichiometry and P addition could improve soil P availability with low C cost

Journal of Plant Nutrition and Soil Science ◽

10.1002/jpln.202100108 ◽

2021 ◽

Author(s):

Chao Fei ◽

Shirong Zhang ◽

Xionghan Feng ◽

Xiaodong Ding

Keyword(s):

Organic Material ◽

P Availability ◽

Nutrient Stoichiometry ◽

Soil P ◽

Soil P Availability ◽

P Addition

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The use of biologically based phosphorus fractions to evaluate soil P availability in reduced P-input paddy soils

Soil Use and Management ◽

10.1111/sum.12430 ◽

2018 ◽

Vol 34 (3) ◽

pp. 326-334 ◽

Cited By ~ 4

Author(s):

J. Yuan ◽

L. Wang ◽

S. Wang ◽

Y. Wang ◽

H. Wang ◽

...

Keyword(s):

Phosphorus Fractions ◽

Paddy Soils ◽

P Availability ◽

Soil P ◽

Soil P Availability

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Influence of Bacterial Inoculation on Growth and Plant Nutrition of Peach Grafted in Different Rootstocks in Calcareous Soil

Sains Malaysiana ◽

10.17576/jsm-2021-5009-10 ◽

2021 ◽

Vol 50 (9) ◽

pp. 2615-2624

Author(s):

Muzaffer İpek ◽

Şeyma Arıkan ◽

Ahmet Eşitken ◽

Lütfi Pırlak ◽

Mesude Figen Dönmez ◽

...

Keyword(s):

Plant Growth ◽

Leaf Area ◽

Iron Content ◽

Calcareous Soil ◽

Growth Parameters ◽

Nutrient Content ◽

Enzyme Synthesis ◽

Soil Conditions ◽

Bacterial Strains ◽

High Iron Content

The highly calcareous soil limits plant growth parameters due to inadequate uptake of plant nutrients. Calcareous soil conditions affect plant growth through impaired chlorophyll synthesis, root growth, enzyme synthesis, and nutrient uptake. To overcome the negative effect of calcareous soil, six bacterial strains namely Alcaligenes 637Ca, Agrobacterium A18, Staphylococcus MFDCa1, Staphylococcus MFDCa2, Bacillus M3, and Pantoea FF1 were inoculated in one-year-old plants of peach cultivar ‘Elegant Lady’ grafted onto GF677 and Nemaguard rootstocks. The bacterial treatments were observed to improve plant growth and nutrient content compared to the control. Moreover, the GF677 rootstock was observed to be more tolerant to high calcareous soil conditions than Nemaguard, showing better plant growth and nutrient content. At the Nemaguard rootstocks, the largest leaf area was observed to be upon inoculation with MFDCa2 (29.1 cm2), FF1 (28.8 cm2), and M3 (28.1 cm2), whereas at the GF677 rootstock, the highest leaf area was observed upon inoculation with MFDCa1 (34.7 cm2), FF1 (32.6 cm2), and 637Ca (31.5 cm2). The leaf iron content was higher in bacterial treatments than the control. In the Nemaguard rootstock, the highest iron content was measured in plants inoculated with 637Ca (133.49 mg kg–1) and M3 (127.64 mg kg–1), whereas in the GF677 rootstock, the treatments MFDCa1 (131.51 mg kg–1), 637Ca (131.21 mg kg–1), FF1 (127.72 mg kg–1), and M3 (127.68 mg kg–1) resulted in high iron content. The results indicate that bacterial inoculations have a significant potential to improve plant growth and can be used as biofertilizers for peach grafted onto Nemaguard and GF677 in high calcareous soil conditions.

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