A study of the root systems of main crops in Northern China
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The relationships between the depth and biomass of root systems and the shoot growth of plants for 18 farm crops and three weeds in Northern China were observed for two years continuously (1987-1988). The root systems of all crops and weeds were distributed in a soil layer range of 40 cm to 300 cm. The depth of the root system of sesame (Sesamum indicum L.) was the most shallow, while hemp (Cannabis sativa L.) was the deepest. Generally, crops with tall stems developed comparatively deeper root systems, but some dwarf crops also developed deeper root systems, such as sugarbeet (Beta vulgaris L.), peanut (Arachis hypogaea L.) and wheat (Triticum aestivum L.). Generally, crops with short growing periods, tolerance for poor soil, and characteristics adapted for a cool environment developed shallow root systems. The depths of root systems were not related to crop types; different root depths existed within all types. The average ratio of root depth and shoot height (R/S.T) of the 18 crops was 2.27, and the average ratio of shoot to root biomass (S/R) was 7.25. The root vertical distribution followed the index reduction model Y = Ae-bx, but b was different in different crops. The three weeds observed all developed deeper root systems and greater biomass than the crops.
Key wordsroot length root system biomass root-shoot ratio root depth
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- Ma Uyan She 1987 Study on the growing movements of wheat root system. ACTA AGRONOMICA SINICA. 13:1, 37–44.Google Scholar
- Pan Shen Lai 1983 Root soil structure of dryland spinach. Journal of Shanxi Agricultural Sciences, 3,21.Google Scholar
- Russell R S 1977 Plant root systems: Their function and interaction with the soil. McGraw-Hill Book Company, UK, Limited.Google Scholar
- Tsa Zhen Hua, et al. 1985 Correlation between the development of root system and the characteristics of top plant. Peking Journal of Agricultural Sciences 3, 10–13.Google Scholar
- Weaver J E 1926 Root development of field crops. McGraw-Hill, New York.Google Scholar
- Wiblerley E J 1989 Cereal Husbandry. Farming Press Book, UK. 51–52 p.Google Scholar