Macro‐and micronutrients removed by upland and lowland rice cultivars in West Africa

    Sahrawat, K L (2000) Macro‐and micronutrients removed by upland and lowland rice cultivars in West Africa. Communications in Soil Science and Plant Analysis, 31 (5&6). pp. 717-723. ISSN 0010-3624

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    Abstract

    Plant analysis is an important component of soil fertility and plant nutrition research. Plant analysis at harvest of the crop forms the basis for constructing nutrient balances and assessing the nutrient needs of production systems. Amounts of macro‐ and micronutrient elements removed by improved, upland and lowland rice cultivars were determined in field experiments at two sites in Ivory Coast. Amounts of nitrogen (N), zinc (Zn), and manganese (Mn) removed for 11 rice grain yield by upland and lowland rice cultivars were similar, but the amounts of phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) removed were higher for lowland than upland rice. The nutrient element harvest indexes (amount in grain/amount in grain plus straw) varied between the cultivars, but more importantly, among nutrient elements. On average the nutrient harvest index was highest for P (69%) and lowest for K (10%). The results suggest that the nutrient requirement of rice for K can be met to a large extent through the recycling of K in rice straw. The amounts of other major nutrients, N and P in the straw were small and hence less scope for supplying these nutrients through the recycling of rice straw.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Others > Soil Science
    Others > Fertilizer Applications
    Depositing User: Library ICRISAT
    Date Deposited: 11 Dec 2011 06:25
    Last Modified: 11 Dec 2011 06:25
    URI: http://oar.icrisat.org/id/eprint/4879
    Official URL: http://dx.doi.org/10.1080/00103620009370472
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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