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Chen H.,Kingenta Ecological Engineering Group Co. | Hu Z.,Kingenta Ecological Engineering Group Co. | Li X.,Kingenta Ecological Engineering Group Co. | Zhang F.,Kingenta Ecological Engineering Group Co. | And 2 more authors.
Archives of Agronomy and Soil Science | Year: 2016

A greenhouse pot experiment was conducted with peanuts (Arachis hypogaea L., Fabceae) to evaluate iron compound fertilizers for improving within-plant iron content and correcting chlorosis caused by iron deficiency. Peanuts were planted in containers with calcareous soil fertilized with three different granular iron nitrogen, phosphorus and potassium (NPK) fertilizers (ferrous sulphate (FeSO4)–NPK, Fe–ethylendiamine di (o-hydroxyphenylacetic) (EDDHA)–NPK and Fe–citrate–NPK). Iron nutrition, plant biomass, seed yield and quality of peanuts were significantly affected by the application of Fe–citrate–NPK and Fe–EDDHA–NPK to the soil. Iron concentrations in tissues were significantly greater for plants grown with Fe–citrate–NPK and Fe–EDDHA–NPK. The active iron concentration in the youngest leaves of peanuts was linearly related to the leaf chlorophyll (via soil and plant analyzer development measurements) recorded 50 and 80 days after planting. However, no significant differences between Fe–citrate–NPK and Fe–EDDHA–NPK were observed. Despite the large amount of total iron bound and dry matter, FeSO4–NPK was less effective than Fe–citrate–NPK and Fe–EDDHA–NPK to improve iron uptake. The results showed that application of Fe–citrate–NPK was as effective as application of Fe–EDDHA–NPK in remediating leaf iron chlorosis in peanut pot-grown in calcareous soil. The study suggested that Fe–citrate–NPK should be considered as a potential tool for correcting peanut iron deficiency in calcareous soil. © 2016 Informa UK Limited, trading as Taylor & Francis Group Source

Liu Z.-X.,Shandong Agricultural University | Liu Z.-X.,Kingenta Ecological Engineering Group Co. | Liu P.,Shandong Agricultural University | Jia X.-C.,Shandong Agricultural University | And 5 more authors.
Chinese Journal of Applied Ecology | Year: 2015

In order to investigate the effects of different irrigation and fertilization on soil microbial properties of summer maize field, we used ZN99 with high nitrogen use efficiency as the test material. The experiment adopted the split plot design which included two irrigation levels (526 mm and 263 mm) as the main plots, three fertilizer types (U, M, UM) and two fertilizer levels (N 100 kg·hm-2 and 200 kg·hm-2) as the subplots. The results showed that the irrigation level affected the regulating effects of fertilizer on soil microbial biomass (carbon and nitrogen) and microbial diversity. The organic fertilizer application must be under the sufficient irrigation level to increase the soil MBC (14.3%-33.6%), MBN(1.8-2.3 times) and abundance significantly. A moderate rate of irrigation, higher rates of organic fertilizer application or organic manure combined with inorganic fertilizer could increase the nitrogen-fixation species and quantity of Firmicutes, γ-Proteobacteria and α-Proteobacteria in the soil. Under the same N level, there was no significant difference of grain yield between organic manure and inorganic fertilizer treatments. Considering sustainable production, proper organic manure application with moderate irrigation could increase the quantity of the soil microbial biomass and microbial diversity, and improve the capacity of soil to supply water and nutrients. ©, 2015, Editorial Board of Chinese Journal of Applied Ecology. All right reserved. Source

Gao X.,Shandong Agricultural University | Li C.,Shandong Agricultural University | Zhang M.,Shandong Agricultural University | Zhang M.,National Center for Quality Supervision and Testing of Fertilizers Shandong | And 3 more authors.
Field Crops Research | Year: 2015

Numerous studies on the traits of controlled release urea in agronomic production and the environmental protection were conducted in various crops system. However, understanding the effect of controlled release urea on potato production and nitrogen use efficiency was currently limited. In the present study, the effect of newly developed controlled release urea (CRU) including polymer coated urea (PCU) and polymer coating of sulfur-coated urea (PSCU) on the N use efficiency, tuber yield and quality of potato (Solanum tuberosum L.) that was grown on silt loamy soil were investigated in a field experiment over 2 yr at different sites. The application rate of polymer-coated urea (PCU) and urea was 150kgNha-1, and polymer sulfur-coated urea (PSCU) was applied at 150kgNha-1 and 225kgNha-1. The N release rates from CRU synchronized the N requirement of potatoes at different stages. The CRU treatments significantly increased total tuber yields by 8.77-19.88% in 2012 and 14.36-26.46% in 2013 in comparison with the urea treatment during the same year. The marketable tuber yield percentage was pronouncedly promoted by the application of PCU and PSCU in both years. N fertilization significantly enhanced the vitamin C, soluble protein and starch content. The significant difference of vitamin C concentration in tuber was only observed in 2013 between PCU and PSCU treatments. The application of PCU and PSCU markedly improved the N agronomic efficiency and apparent N use efficiency, but obviously decreased the N physiological efficiency relative to urea treatment in 2012 and 2013. Furthermore, enhancing dose of PSCU did augment total tuber yield and did not increase the marketable yield percentage, but decreased the apparent N use efficiency compared with PSCU treatment. Consequently, moderate amounts (150kgNha-1) of PSCU and PCU are recommended to replace urea for gaining greater yields of potato and nutrient use efficiency. © 2015 Elsevier B.V. Source

Kingenta Ecological Engineering Group Co. | Date: 2016-07-19

Fertilizers; humus; fused phosphate fertilizers; calcium superphosphate fertilizer; compost.

Kingenta Ecological Engineering Group Co. | Date: 2016-01-07

Fertilizers for agricultural use; fertilizers; compost; humus; fused phosphate fertilizers; calcium superphosphate fertilizer; chemical fertilizers.

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