Studies on physical and chemical properties and improvement of soil productivities in heavy clayey paddy fields, 5: Effects of application of rice straw on initial growth of rice plants

agricultura de regadio aliment pour animaux alimentos alimentos para animales animal litter anthropogenic soil types application methods apport d'engrais arroz arroz irrigado biological development cama (animales) cereal products cereales cereals chemicophysical properties clay soils crecimiento croissance cropping systems crops cultivos cultivos de grano desechos economic plants environment environnement esparcido feeds fertilidad del suelo fisiologia fonction physiologique foods forraje grosero fourrage grossier grain crops growing media growth irrigated farming irrigated rice lithological soil types medio ambiente medio de cultivo medios de enraizamiento methode methods milieu d'enracinement paddy soils paille paja physiological functions physiologie physiology plantas plante plante de culture plants productos productos de origen vegetal productos derivados de cereales products produit produit alimentaire rice riz rooting media roughage sistemas de cultivo site factors soil fertility soil physicochemical properties soil types sol argileux solid wastes straw subproductos subproductos de cereales substrat de culture suelo arcilloso textural soil types tipos texturales de suelos type de sol type de sol lithologique type de sol textural vegetable products wastes