The preference of maize plants for nitrate improves fertilizer N recovery efficiency in an acid soil partially because of alleviated Al toxicity

Author(s):  
Jia Lin Wang ◽  
Xue Qiang Zhao ◽  
Hao Qing Zhang ◽  
Ren Fang Shen
Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 765
Author(s):  
Hao Qing Zhang ◽  
Xue Qiang Zhao ◽  
Yi Ling Chen ◽  
Jia Lin Wang ◽  
Ren Fang Shen

The root is the main site of nitrogen (N) acquisition and aluminum (Al) toxicity. The objective of this study is to investigate whether liming and cultivation of an Al-tolerant rice (Oryza sativa L.) cultivar can improve root growth, thereby increasing N acquisition by rice plants in acid paddy soil. Two rice cultivars (‘B690’, Al-sensitive, and ‘Yugeng5’, Al-tolerant) were cultivated with 15N-labeled urea, and with or without lime in an acid paddy soil (pH 4.9) in pots. We examined root and shoot growth, soil pH, soil exchangeable Al, N uptake, 15N distribution in plant-soil system, and fertilizer N recovery efficiency. Results showed that liming improved the root growth of ‘B690’ by decreasing soil exchangeable Al concentrations, in both N-limited and N-fertilized soils. Liming enhanced the N uptake of ‘B690’ only in the absence of N fertilizer. The root weight of ‘Yugeng5’ was greater than that of ‘B690’ without lime, but the two cultivars showed similar N uptake. The fertilizer N recovery efficiency and N loss did not differ significantly between limed and non-limed conditions, or between the two rice cultivars. Thus, liming an Al-sensitive rice cultivar and cultivating an Al-tolerant one improves root growth, but does not enhance fertilizer N recovery efficiency in the present acid paddy soil.


2020 ◽  
Vol 23 (4) ◽  
pp. 417-426
Author(s):  
Chisaka Arisede ◽  
Zaman-Allah Mainassara ◽  
Cairns Jill ◽  
Tarekegne Amsal ◽  
Magorokosho Cosmos ◽  
...  

2017 ◽  
Vol 81 (2) ◽  
pp. 331-340 ◽  
Author(s):  
Carlos M. Romero ◽  
Richard E. Engel ◽  
Chengci Chen ◽  
Roseann Wallander ◽  
Clain A. Jones

2017 ◽  
Vol 68 (3) ◽  
pp. 202 ◽  
Author(s):  
Agustin F. Arata ◽  
Silvia E. Lerner ◽  
Gabriela E. Tranquilli ◽  
Adriana C. Arrigoni ◽  
Deborah P. Rondanini

Wheat crop response to sulfur (S) depends on nitrogen (N) level, genotype and environmental conditions, demonstrating strong genotype × environment × nutrients interactions. The agronomic-use efficiency of both nutrients has not been evaluated in a wide range of modern genotypes differing in their cycle length and baking quality. The aim of this study was to analyse the effect of N and S fertilisation on yield components and use efficiency of both nutrients in 24 modern, high-yielding bread wheat genotypes (including long and short crop cycles) grown in contrasting environments in the Humid Pampa of Argentina. Two experiments were conducted under contrasting seasonal conditions on a Mollisol in Azul, Buenos Aires. Significant effects of N (range 15–200 kg N ha–1) on grain yield were observed in all genotypes. By contrast, responses to S (30–100 kg S ha–1) were found only at high N level in low soil-fertility environments, differing between long and short cycles. Genotype × fertilisation interaction was significant in the environment with higher soil fertility. Sulfur addition improved N-recovery efficiency (0.15 v. 0.32) and agronomic efficiency of the available N (84 v. 93 g g–1) in the poor-fertility environment, characterised by their N and S deficiency and moderate level of organic matter. Grain N-recovery efficiency was largely explained by increases in grain number, whereas S recovery was also associated with increases in grain nutrient concentration. We conclude that genotype and environment strongly alter fertiliser-use efficiency, providing valuable information for ranking genotypes and optimising site-specific management of wheat crops in the Humid Pampa of Argentina. Grain S percentage may be useful as a physiological marker for selection of bread wheat genotypes with high apparent S recovery.


Soil Research ◽  
1986 ◽  
Vol 24 (1) ◽  
pp. 1 ◽  
Author(s):  
AR Mosier ◽  
WS Meyer ◽  
FM Melhuish

A study using 15N~labelled fertilizer was initiated in a lysimeter facility to quantify the amount of N assimilated by maize plants and that which remained in the soil at the end of a cropping season. Maize was planted in 0.43 m2 by 1.35 m deep intact Marah clay loam soil cores removed from an improved pasture in mid-October 1983. Two irrigation treatments, flood-impounding water on the soil for up to 72 h, and control-applying enough water to prevent plant stress without ponding, were employed. The crop was harvested in early April 1984 and the amount of fertilizer- and soil-derived N in the plant and remaining in the soil was determined. Grain yields were reduced about 33% by flood irrigation. Although about 30 kg N ha-1 more fertilizer N was lost from the flood-irrigated system, the difference in N recovery between the flood- and control-irrigated soils was not sufficient to account for the reduced grain yield. Flood-irrigated plants were less efficient in transporting fertilizer N to the seed than were control irrigation plants. The data suggest that the reduced seed yield and total N content of maize plants grown under flood irrigation was metabolically controlled rather than being derived from a difference in soil mineral N content compared with control-irrigated soils.


Author(s):  
Niamat Ullah Khan ◽  
Sami Ullah ◽  
Azhar Abbas Khan ◽  
Umbreen Shahzad

Zero tillage straw retained with optimum N is an important strategy to increase soil fertility and cotton (Gossypium hirsutum L.) yield in wheat (Triticum aestivum L.)-cotton system.  A 3 years field experiment was conducted during 2014, 2015 and 2016 to study the impact of two tillage techniques [zero tillage plus wheat straw retained- ZTsr and conventional tillage-CT straw burnt (CTsb, with disc plow, tiller, rotavator, and leveling operations)] and four nitrogen rates namely 0, 100, 150 and 200 kg N ha-1 on cotton yield and soil fertility. Results indicated that bolls/plant–1, weight per boll, seed cotton yields, lint percentage and N recovery efficiency were highest with 150 kg N ha–1. Interaction tillage into N indicated that ZTsr had graeter bolls plant-1, bolls weight, seed cotton yields, lint percentage and N recovery efficiency compared to CTsb. ZTsr had more soil organic matter (SOM) and total soil nitrogen (TSN) compared to CTsb. ZTsr with 150 kg nitrogen per hectare enhanced cotton yield and soil fertility on sustainable basis in arid environment of Dera Ismail Khan.


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