| Research on growth variations of maize by whole film double furrow sowing based on Richards model from traditional cultivation mode |
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| DOI：10.7606/j.issn.1000-7601.2016.04.32 |
| Key Words: corn whole field surface plastic mulching and double ridge-furrow planting growth potential richards model |
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| Abstract: |
| To investigate the differences in growth characteristics and effects on yield of maize in the field between double furrow sowing with film and the traditional cultivation mode, based on Richards model, a study was carried out through dynamic mathematical method using spring maize under three cultivation treatments. The results showed that plant height, leaf area per plant, the number of visible leaf growth accumulation under three treatments showed a slow-fast-slow curve as Richards model pattern. Significant differences were observed on Richards curve of growth and accumulation for each index, growth rate, and speed variation curve between double furrow sowing with film and the semimembranosus and open plots, showing a high initial growth potential of R0. Index of growth reaching to exponential and stable growth stage was 8～20 days earlier than that of the control. The maximum growth rate was obviously higher and the emergence time was earlier than those in the hcontrol. The maximum height growth rate of maize plant by double furrow sowing with whole film was 6.755 cm·day-1, 1.512 times as high as that in the control. The maxium growth rate in green leaf area was 330.6 cm2·day-1·plant-1, 1.409 times as high as that in the control. Number of leaves per plant showed maximum growth rate of 0.412 day·plant-1, 1.383 times as high as that in the control. Double furrow sowing with whole film on maize growth rate changed greatly, showing a characteristic of fast acceleration and fast deceleration. A significant growth was observed during the stable growth period, 1.493～1.618 times as high as that in the control. The crops at late growth stage allocate energy for reproductive growth, resulting in slow senescence rate of maize leaf. This allows maize pollination and grain filling, showing high grain number per ear, grain leaf ratio and 100 grain weight, which increases maize yield. |
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