 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,GHD Gouden Styler, 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,moncler sito ufficiale, 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,moncler doudoune, 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,moncler outlet, 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,tory burch outlet, 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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