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    Improvement of dry tropical rangelands on Hainen Island, China. 3. Legume response to initial fertilizers

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    Author
    Michalk, D. L.
    Fu, N. P.
    Zhu, C. M.
    Issue Date
    1998-01-01
    Keywords
    Stylosanthes hamata
    superphosphates
    forage legumes
    tropical grasslands
    grassland improvement
    sandy soils
    loam soils
    yields
    China
    Macroptilium atropurpureum
    
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    Citation
    Michalk, D. L., Fu, N. P., & Zhu, C. M. (1998). Improvement of dry tropical rangelands on Hainen Island, China. 3. Legume response to initial fertilizers. Journal of Range Management, 51(1), 97-105.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644122
    DOI
    10.2307/4003571
    Additional Links
    https://rangelands.org/
    Abstract
    During 1981-83, we identified nutrient requirements and fertilizer strategies for the development of legume-based pastures in dry tropical rangelands of Hainan Island, China. Nutrient requirements for pastures grown on sandy and red loam soils were established using soil tests and missing element experiments with 3 test legumes. An acute P deficiency (< 5 mg kg-1 Bray P) was detected by soil tests on sandy soils, but no deficiencies were found on loam soil. The exclusion of P from a total fertilizer treatment reduced relative yield to 20% of potential on sandy soil. A factorial P rates experiment replicated in space and time showed a strong curvilinear response for stylo (Stylosanthes hamata L. Taub. cv. Verano) and siratro (Macroptilium atropurpureum (DC.) Urban) based pastures on sandy soil. No response was observed on loam soil. Given limited superphosphate supplies available for range improvement in south China, results from these studies showed no benefit from applying P fertilizer to stylo pastures grown on soils with available P > 20 mg kg-1. In contrast, application of P fertilizer proved both profitable and essential for development of legume-based pastures on P-deficient sandy soils. It is recommended that a rate of about 40 kg of P ha-1 should be applied at establishment of stylo pastures on sandy soil. At this rate both legume yield and P content of tops should be maintained at levels needed to sustain a beef production enterprise and return about 1.5 per dollar invested in fertilizer.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003571
    Scopus Count
    Collections
    Journal of Range Management, Volume 51, Number 1 (January 1998)

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