Effects of long-term organic and chemical fertilization on N and P in wheat plants and in soil during crop growth

摘要

Of all farming practices, balanced fertilization and management of soil fertility are among the most important measures toward a sustainable crop production that will be required to meet the demands of food grain production for burgeoning (> 1 billion) human populations of India. Proper soil fertility management is indispensable to ensure adequate nutrient availability to plants and improve or sustain crop yields. In a soil-plant system, any alteration on the fertility management (e.g., balanced or imbalanced fertilization, use of organics, etc.) will have a strong feed back at the soil-plant interface (Kuzyakov, 2002; Nguyen, 2003), and subsequently on the long-term agricultural productivity and sustainability of the ecosystem.