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defgf24uw
Wysłany: Sob 17:52, 12 Lut 2011
Temat postu: columbia sportswear outlet SPRING maize photosynth
SPRING maize photosynthetic performance and yield components
Photosynthetic potential of the whole growth period in the open field covered with corn maize photosynthetic potential was similar to the single-peak curve. Plastic Mulching the growth period of spring maize photosynthetic potential is higher than the open field (Table 2), the largest increase in the large bell stage by 790047m · d / hm increased 933728m · d/hm2. Increased l8.2%. Covered the whole growth period of the total photosynthetic potential of maize as 4269822m · d / hm. Than the open field of 3816028m · d/hm2 increase 453794m2 · d/hm2,
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, increased l1.9%. Mulching can be seen in the expansion of photosynthesis of maize populations, but also extended the time of photosynthesis. The formation of the spring dry matter basis. This is the film one of the important reasons yield cultivation. 2.1.3 mulching on spring corn group net assimilation rate of maize in Table 2 groups of photosynthetic potential (m. · D / hm) Received :2004 -06-1116 covered under Inner Mongolia Agricultural Science and Technology, seedling, jointing,
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, grouting of the net assimilation rate is higher than the open field, were increased by 0.630g/m2. d, 0.171g/md,
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, 1.683g/md, net assimilation rate of the overall film is 6.423g / m · d than the open field of 6.310g / m · d increase 0.113g/md, increased by 1. 79% (Table 3). Table 3 maize groups, net assimilation rate (g / m · d) 2.2 mulching on spring corn yield of film on spring corn yield components was significant. Spikes from the 4000 Spike / 667m increase to 4143 Spike / 667m2. Increased 3.6%, shows that plastic film mulching cultivation reduced the spike-free seedlings,
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, an increase of acres of spikes, increasing spike rate. Grain number increased to 648 from the 585,
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, increased 10.8%, grain weight increased to 336 by the 308.5g. Og, increased 8.9%, film for the spring corn on nutrient absorption and full use of light energy to ensure that the big grain of spring corn bread, an increase of 24.9%, which is the direct cause of film yield ( Table 4). Table 4 Yield components of plastic film mulching cultivation 3 Conclusion and discussion to extend the time of photosynthesis, the essence of its yield. Covered the whole growth period of spring maize cultivation to leaf area index were higher than the open field, covered leaf area index was 3.459 on average, exposed to the 3.144 increase over 10.0% of the total photosynthetic potential of the whole growth period 4269822m · d / hm. Than the open field of 3816028m · d / hm increase 453794m · d/hm2, improve l1.9%.
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