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Soil, Fertilizer, and Plant Silicon Research in Japan
 
 

Soil, Fertilizer, and Plant Silicon Research in Japan, 1st Edition

 
Soil, Fertilizer, and Plant Silicon Research in Japan, 1st Edition,Jian Feng Ma,Eiichi Takahashi,ISBN9780444511669
 
 
 

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Elsevier Science

9780444511669

9780080525761

294

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Description

Silicon (Si) plays a significant role in the resistance of plants to multiple stresses including biotic and abiotic stresses. Silicon is also the only element that does not damage plants when accumulated in excess. However, the contribution of Si to plant growth has been largely ignored due to its universal existence in the earth's crust. From numerous intensive studies on Si, initiated in Japan about 80 years ago, Japanese scientists realized that Si was important for the healthy growth of rice and for stability of rice production. In a worldwide first, silicon was recognized as a valuable fertilizer in Japan. The beneficial effects of Si on rice growth in particular, are largely attributable to the characteristics of a silica gel that is accumulated on the epidermal tissues in rice. These effects are expressed most clearly under high-density cultivation systems with heavy applications of nitrogen. Si is therefore recognized now as an ''agronomically essential element'' in Japan.

Recently, Si has become globally important because it generates resistance in many plants to diseases and pests, and may contribute to reduced rates of application of pesticides and fungicides. Silicon is also now considered as an environment-friendly element. The achievements of Si research in Japan are introduced in this book, in relation to soils, fertilizers and plant nutrition.

Jian Feng Ma

Affiliations and Expertise

Faculty of Agriculture, Kagawa University, Ikenobe 2393 Miki-cho, Kita-gun, Kagawa 761-0795, Japan

Eiichi Takahashi

Affiliations and Expertise

Kyoto University, Nakaadachi-cho 23-8, Yoshida Sakyo-ku, Kyoto 606-8306, Japan

Soil, Fertilizer, and Plant Silicon Research in Japan, 1st Edition

1. Brief history of silicon research in Japan. 2. Silicon sources for agriculture. Silicon supply for paddy rice from natural sources. Irrigation water. Soils. Silicon supply from organic and inorganic fertilizers. Compost. Application rate in the past and the present. Short-term availability of Si in rice straw for rice plants. Long-term availability of Si in compost for rice plants. Rice husk. Silicate fertilizers. Calcium silicate slags. Fused magnesium phosphate. Potassium silicate fertilizer. Porous hydrate calcium silicates. Silica gel. Estimation of available silicon in silicate fertilizers. 3. Silicon in soil. Behavior of silicon in paddy soil. Estimating the silicon-supplying capacity of paddy soils. Measuring acetate-buffer soluble silicon (Acetate buffer method). Measuring silicon dissolved under submerged condition (Incubation method). Measuring silicon in supernatant (Supernatant method). Measuring easily soluble silicon (Easily soluble Si method). Measuring silicon dissolved in surface water (Surface water dissolution method). Measuring Si dissolved in phosphate buffer (Phosphate buffer method). Environmental factors controlling the availability of silicon for rice plants in paddy soils. Balance sheet of silicon in paddy soil-past and present. 4. Effect of silicate fertilizer application on paddy rice. Criteria for predicating silicate fertilizer requirement for paddy rice. Field experiments on the effects of silicate fertilizer application. Slag-calcium silicate. Porous hydrate calcium silicate. Silica gel and potassium silicate. Effect of calcium in slags on silicon uptake by rice. 5. Silicon-accumulating plants in the plant kingdom. Criteria for discriminating Si-accumulating plants from non-accumulating plants. Characteristics of silicon accumulators and their distribution in plant kingdom. Variety difference in silicon content in the Si-accumulating and intermediate-type species. 6. Silicon uptake and accumulation in plants. Three modes of uptake for silicon. Characteristics of Si uptake by rice. High capacity for Si uptake. Uptake form of Si. Kinetics of Si uptake. Effect of transpiration on Si uptake. Effect of nutrient salts on Si uptake. Participation of metabolism in Si uptake. Effects of metabolic inhibitors on Si uptake. Effect of glucose and organic acids on Si uptake. Effects of light on Si uptake. Roles of root hairs and lateral roots in silicon uptake. Genotypical difference in silicon uptake. A rice mutant defective in silicon uptake. Similarity mode of uptake for silicon and germanium. Effect of Ge on the growth. Similarity in uptake between Si and Ge. Chemical form and accumulation process of silicon in rice. 7. Functions of silicon in plant growth. Beneficial effects of silicon on plant growth. Rice. Deficiency symptoms. Effect of time of Si supply on the growth of grain yield. Effect of Si supply levels on the growth and grain yield. Effect of Si on the growth of various rice cultivars. Effect of Si on nutrient uptake. Barley. Tomato. Cucumber. Soybean. Strawberry. Bamboos. Scouring rush and horsetail. Functions of silicon. Stimulation of photosynthesis and translocation of photoassimilated CO2. Photosynthesis. Effect of Si on the translocation of photoassimilated CO2 to panicle. Alleviation of physical stress. Radiation injury. Water stress. Climatic stress. Improvement of resistance to chemical stress. Nutrient-imbalance stress. Excessive N stress. Deficiency of P and excess stress. Metal toxicity. Excess Na. Fe toxicity. Mn toxicity. Al toxicity. Increase of resistance to biotic stress. Disease. Pest. Working process of beneficial effects of silicon on plant growth. 8. Summary and prospect of silicon research. Major achievements and prospect of the research on silicon in soil. Survey on Si fertility. Method for evaluation of available Si in paddy soil. Major achievements and prospect of research on silicon fertilizer. Utilization of slag as a silicate fertilizer. Development of new silicate fertilizers. Evaluation of rice straw as a Si source. Major achievements and prospect of research on silicon in plants. Distribution of Si-accumulator in plant kingdom. Form of silicon taken up by rice plants and the mechanism of uptake. Form and distribution of silicon in the plant. Beneficial effects of Si on crop growth. 9. Silicon research in the world. Effect of silicon on crop production. Rice. Upland rice. Sugarcane. Horticultural crops. Role of silicon in disease and pest control. Alleviative effect of silicon on abiotic stresses. Appendix. Appendix 1. SiO2 concentration of 380 river waters. Appendix 2. Survey on SiO2 contents in flag leaf of rice plants. Appendix 3. Content of Si and Ca in Angiospermae, Gymnospermae, Pteridophyta and Bryophyta. Content of Si and Ca in Pteridophyta. Content of Si and Ca in Oryzeae. Content of Si and Ca in Bambusoideae, Pooideae, Panicoideae, Ergrostoideae. Content of Si and Ca in Commelinaceae. Content of Si and Ca in Juncaceae. Content of Si and Ca in Cucurbitaceae. Content of Si and Ca in Urticaceae. Si accumulation in 4 sub-families of Gramineae. Distribution of Si accumulator in Pteridophyta. Water-soluble SiO2 content in the soils. Appendix 4. Si content of barley grain. Standard variety. Barley core collection of United State. Barley core collection of East Asia. References. Index.
 
 
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