nlwxpearo
Joined: 13 Dec 2010
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Location: England
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 Posted: Wed 10:23, 16 Feb 2011 Post subject: White asparagus with different nitrogen fertilizer |
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White asparagus with different nitrogen fertilizer production and fertility indices and quality of
The 40d day average level of growth and product have significant impact. Among them,[link widoczny dla zalogowanych], pure N300kg/hm (NK) treatment the highest yield level, the number shoots up. Within a certain range (0 ~ 300kg/hm), nitrogen (, kg / hm) and spears total (,,。, kg / hm) and a number of shoots (y2, a / hm), respectively,[link widoczny dla zalogowanych], showed the following linear relationship, yl = 2004.5x +3780 (R = 0.9212), y2 = 576-3x + l389.8 (R2 = 0.9297). 3.2 Effects of nitrogen fertilizer Vc content of white asparagus spears and Brix also has some influence, that is, when the nitrogen application rate was 0 ~ 300kg/hm time (NOPK ~ NK), Vc content spears growing trend; N volume 375kg/hm (N4PK) and 450kg/hm2 (N5PK), the spears Vc content decreased, but the spears in nitrogen Brix was 225kg/hm (N2PK) treatment peaked, 300kg/hm (NK) began to fall after its content,[link widoczny dla zalogowanych], Vc content variation and not entirely consistent. Nitrogen in the test 3.3 0 ~ 450kg/hm (NOPK-N5PK) range, with the increase of nitrogen fertilizer on asparagus yield,[link widoczny dla zalogowanych], quality and fertility index of an entirely different effect, comprehensive analysis of significant difference between the results obtained the 300kg/hm nitrogen fertilizer can be used as nitrogen asparagus similar areas of a reference. 3.4 The test also found that nitrogen was higher than 300kg/hm (ie N4PK,[link widoczny dla zalogowanych], N5PK), underground roots of asparagus significantly inhibited the growth and development, mainly for the growth of undesirable roots, root hairs atrophy.
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