Research On Rice Growth Characteristics And Yield Of The Subsoil Fertility

Rice production of Heilongjiang province is the most important areas in china, the planting area accounts for a quarter of arable land.To increase rice yield, more than previous research from the aspects of breeding, fertilization, irrigation and other research, and it has a certain effect.But ignored the subsoil effects on rice growth and development.For clear subsoil impact on rice growth characteristics and yield.A pot experiment was used to study the effect of different types of subsoil impact on rice growth characteristics and yield in Heilongjiang province.To carry out the relationship of different soil types and rice growth, nutrient uptake and yield.The main results are as follows:(1)The results showed that there were differences of rice chlorophyll and plant height in different types of soil and the presence of subsoil treatment in heading stage, there were differences of dry matter in mature stage, the content of chlorophyll order was black soil>meadow soil>albic soil, the subsoil treatment is higher than no subsoil, the plant height order was meadow soil>black soil>albic soil, the subsoil treatment is higher than no subsoil, the dry matter order was meadow soil>black soil>albic soil,the subsoil treatment is higher than no subsoil,(2)Black soil type of the subsoil treatment and paddy soil and meadow soil of rice paddy soil root total length 、root surface area, root number, root dry weight below no subsoil in rice heading stage.there were differences of vertical root length and root dry weight in different types of soil and the presence of subsoil treatment in heading stage, the vertical root length order was black soil>meadow soil>albic soil, the root dry weight order was meadow soil>black soil>albic soil, the subsoil treatment is higher than no subsoil, there were no dramatic differences on rice panicles and grain number and was great significant differences in rice yield,the order was black soil>albic soil>meadow soil. Various types of soil are shown as subsoil treatment is higher than no subsoil.(3)There are significant difference between different soil types.Black soil yield up to 143.84 g/pot,136.56 g/pot followed by white pulp soil, meadow soil is 131.56 g/pot,the subsoil treatment is higher than no subsoil. Black soil has highest subsoil contribution rate of production is 24.8%, meadow soil is 9.6%, the white pulp soil was 5.9%.(4)Plant organs of trace element content in leaf, stem and grain Cu, Mn, Fe, significant difference between the zinc content in different types of soil,And trace elements in different organs distribution rule is not consistent,Fe in the different organs in order to leaf > stem > grain,Blade is the content of Fe in Fe cumulants on the stems of 2 times the left and right sides, about five times the amount of grain,Order of Mn content in different organs of rice leaf > stem > grain,Mn accumulation in the leaves is the content in stem sheath 3-4 times, grain Mn cumulant is 4-5 times, On different types of soil,White wash the highest soil Cu content in leaf, black soil is the highest content of leaf sheaths, meadow soil is the highest Cu content in the grain.different types of soil zinc content in different organs order not nearly the same, but different types of soil zinc content were the highest levels in the stem sheath.(5)Different cultivation of rice numbers and yield difference was not significant,Significant difference was found in grains,Cultivation of rice a year in the growth period the growth characteristics of indicators were higher than planting rice of fixed number of year for two years.