Effect Of Different Nutrient And Water Regine On Rice Production And Paddy Soil Environmental Qualities

Rice paddy field is china's largest cultivation area. It occupies the largest area for its production. It often brings up food products, consumes most of the water for irrigation. The demand for water resources is very high. But worldwide, china is one of the countries with poor water availability because its water means resources by person represents only 1/4 of the world. China's population is large, food demand is high, and therefore it needs adequate cultivation practice. Except for cultivated land and fertilization, water is a very important factor in rice cultivation.Through greenhouse experiment in pots, with no fertilization applied(CK), only chemical fertilization applied(CF), chemical fertilization plus manure(CM), this experiment studied the effects of three soil moisture regimes, alternate wetting and drying system(AWD), continuous water logged(CWL) and controlled irrigation(DRA) on rice production and paddy soil environmental qualities. As results of the research, they are as follows:1. Nutrient and water are important factors in rice production. Under this experiment, in comparison with CK, CF and CM have separately very remarkably influenced rice growth, elevated rice yield. Under the same fertilization regime, different water managements have remarkably influenced rice plant height, leaf length, total tiller number, effective tiller number, spike length, total grain number/spike, effective grain number/spike, one thousand grains weight and yield weight. Furthermore, rice yield is higher at AWD water regime than at CWL condition and than at DRA condition.2. In comparison with CK, fertilization treatments yield grain has remarkably...