Effect of soil clod-size on the Emergence and Growth in Some Crops
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Abstract:
Five crops with different seed size, corn (Zea mays), soybean (Glycine max), Japanese radish (Raphanus sativus), carrot (Daucus carota) and komatsuna (Brassica rapa), were used in the present examination. With the aim of clarifying the effectiveness of soil clod-size on emergence and early growth of these crops, emergence ratio, plant length and dry weight of top and root were measured using wagner pot (1/2000a) contained with 5 levels of soil clod-size, <4mm, 4-10mm, 10-20mm, 20-40mm and 40-50mm in diameter. Emergence ratio in any crops decreased as soil clad-size was large, especially in carrot. Emergence ratio was inhibited in the 20 mm-soil clod in corn and soybean that produce large seed, however, it was inhibited in 10mm soil clod in carrot that has small and flat seed. There is not a significant difference in plant length and top dry weight in all crops among the soil clad-size less than 40mm. On the other hand, root dry weight became small as soil clod-size was large, and soil clod-size affected the root growth more than top growth comparatively. From these result, it is necessary to prepare the soil clod less than 10mm in seeding ditch to obtain high emergence ratio and vigorous early growth for all crops in reduced tillage.Keywords:
Daucus carota
Dry weight
Dry land
Raphanus
Daucus carota
Apiaceae
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Brassicaceae
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Brassicaceae
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Daucus carota
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In order to find an appropriate Sodium Silicate (SS) application amount and improve the resistance to salt stress in dry-land wheat. The effects of SS on growth and physiological characteristics under 0.2% salt stress in dry-land wheat seedlings by applying different amounts of SS had been studied in the pots in the artificial climate chamber with the variety wheat Jimai22. The results indicated that, SS can increase root-shoot ratio, aboveground and underground fresh weight under 0.2% salt stress in dry-land wheat seedlings. Meanwhile, SS also could improve Superoxide dismutase (SOD), Peroxidase (POD) activity and reduce Malondialdehyde (MDA) content. In the SS amount range of 0~7.5 kg/667 m2, the SS application amount of 5 kg/667 m2 was the best to promote the growth of dry-land wheat seedlings under 0.2% salt stress.
Dry land
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Malondialdehyde
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The present investigation entitled "Studies on effect of different organic manures on growth and yield of radish (Raphanus sativus L.)" was carried out during
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