Changes of vegetable yields, soil chemical properties and microbial biomass to mid-term additions of organic and mineral fertilizer in South China

In subtropical lowlands, the introduction of soybean and livestock in rotation are an alternative to rice monoculture. Due to the nutrient cycling process improved by animal grazing in winter fertilized pastures, soybean may not respond to mineral fertilization under a no-till integrated crop–livestock system (ICLS). Thus, the objectives of this study were to evaluate (i) the soybean yield response to different fertilization levels of phosphorus (P) and potassium (K) and (ii) the relationship between soybean yield and soil chemical properties sampled in different soil layers, in a no-till ICLS in subtropical lowlands. Two field studies were conducted in a system that included a soybean-flooded rice rotation integrated with cattle grazing during the winter season. During the 2015/2016 cropping season, five levels of P and K fertilization were applied to the soil. During the 2017/2018 cropping season, the relationships between soybean yield and soil chemical properties were evaluated under no fertilization treatment. Soybean yield under an ICLS did not respond to P and K fertilization, even when the soil P level was below the critical threshold. The associations between soybean yield and soil chemical properties were greatest in the 10–20 cm soil layer as compared with the 0–10 cm soil layer, especially for available P, followed by pH and soil organic matter (SOM). The crop rotation and ICLS adoption under no-till reduced the soybean reliance for mineral fertilization prior to cropping. Results of this study inform producers of possible fertilization adjustments, in which supplementing mineral fertilizer for soybean may not be necessary.

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Vineyard soils under organic and conventional management—microbial biomass and activity indices and their relation to soil chemical properties

Biology and Fertility of Soils ◽

10.1007/s00374-007-0225-7 ◽

2007 ◽

Vol 44 (3) ◽

pp. 443-450 ◽

Cited By ~ 44

Author(s):

Björn Probst ◽

Christian Schüler ◽

Rainer Georg Joergensen

Keyword(s):

Microbial Biomass ◽

Chemical Properties ◽

Soil Chemical Properties ◽

Conventional Management ◽

Vineyard Soils ◽

Activity Indices

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Effect of digested slurry on the dry matter production and arbuscular mycorrhizal colonization of two genotypes of Zoysia grass

The Journal of Agricultural Science ◽

10.1017/s0021859617000703 ◽

2017 ◽

Vol 155 (10) ◽

pp. 1565-1576

Author(s):

M. TOBISA ◽

Y. UCHIDA ◽

S. IWASA ◽

T. TSUKIYAMA ◽

Y. ASANO ◽

...

Keyword(s):

Dry Matter ◽

Inorganic Nitrogen ◽

Chemical Properties ◽

Mineral Fertilizer ◽

Arbuscular Mycorrhizal ◽

Am Fungi ◽

Soil Chemical Properties ◽

Phosphorus Concentration ◽

Available Phosphorus ◽

Continuous Application

SUMMARYThe present study investigated the dry matter yield (DMY) and arbuscular mycorrhizal (AM) colonization (internal hyphae, arbuscules, and vesicles) of two genotypes of zoysia grass (Zoysia japonica strain Aso and cv. Asagake) at three rates (10, 20 and 40 g N/m2/year) of application of digested slurry (DS) or mineral fertilizer. Soil chemical properties (available phosphorus concentration, pH and electrical conductivity (EC)) were also measured as factors associated with AM colonization. The fertilizer type (DS v. mineral fertilizer) had an effect on DMY depending on the plant genotypes but had little or no effect on AM colonization, and soil chemical properties, indicating that DS can be used as a substitute for mineral fertilizer; however, it is necessary to apply it taking into account the ratio of inorganic nitrogen (N). However, heavy DS application decreased colonization by internal hyphae. Furthermore, even at the lowest rate, the continuous application of DS decreased colonization by arbuscules and vesicles in both genotypes, which were associated with decreasing soil pH and increasing EC. The results suggest that zoysia grass should be fertilized with DS at a rate of <10 g N/m2/year in order to achieve a continuous association with AM fungi, although this range of N application is sub-optimal for zoysia grass production.

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Influence of organic-mineral fertilization of an oxisol on soil chemical properties and Bracharia brizantha production

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832011000600037 ◽

2011 ◽

Vol 35 (6) ◽

pp. 2219-2226 ◽

Cited By ~ 2

Author(s):

Edmar Andrade Schiavoni ◽

Marlene Cristina Alves ◽

Zigomar Menezes de Souza ◽

Frederick Gonçalves Costa

Keyword(s):

Manufacturing Industry ◽

Soil Analysis ◽

Block Design ◽

Chemical Properties ◽

Mineral Fertilizer ◽

Soil Chemical Properties ◽

Mineral Fertilization ◽

Single Superphosphate ◽

Organic Mineral ◽

L 14

The use of organic-mineral fertilizer produced by the manufacturing industry of lysine and threonine amino acids can improve the fertility of tropical soils. The objective of this study was to evaluate the influence of different doses of the organic-mineral fertilizer named Ajifer L-14 on chemical properties and on the response with increased production of a forage on a Red Latosol in the northwestern region of São Paulo State, Brazil. A randomized block design was used with seven treatments and four replications. The treatments consisted of: T1- control (without application of Ajifer L-14); T2- control (natural vegetation); T3- mineral fertilization according to crop requirements and soil analysis (application of 1.35 kg plot-1 of urea, 2.20 single superphosphate, and 0.51 KCl, corresponding to 60 of N, 40 P2O5 and 30 kg ha-1 of K2O); T4- fertilization with Ajifer L-14 according to the recommendation resulting from the soil chemical analysis (40 L plot-1, corresponding to 60 kg ha-1 N); T5- fertilization with Ajifer L-14, at a rate of 150 % of the recommended values (60 L plot-1, corresponding to 90 kg ha-1 N); T6- fertilization with Ajifer L-14 at a rate of 50 % of the recommended values (20 L plot-1, corresponding to 30 kg ha-1 N); T7- fertilization with Ajifer L-14 at a rate of 125 % of the recommended values (50 L plot-1, corresponding to 75 kg ha-1 N); T8- fertilization with Ajifer L-14 at a rate of 75 % of the recommended values (30 L plot-1, corresponding to 45 kg ha-1 N). The following soil chemical properties were evaluated (layers 0.0-0.1 and 0.1-0.2 m): P, organic matter, pH, K+, Ca2+, Mg2+, cation exchange capacity, potential acidity, and base saturation. The application of this organic-mineral fertilizer does not influence the soil chemical properties. Regression analysis indicated a polynomial relationship between the application rates of organic-mineral fertilizer and the production of dry matter and crude protein of Bracharia Brizantha.

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