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水稻氮的主要来源是土壤有机氮的矿化,即使在施化学氮肥比例高的情况下也是这样.据我室用~(15)N示踪证明,在田间栽培条件下,当季水稻所吸取的氮素营养有70%以上是来自土壤,而稻田土壤氮素供应状况的特点是土壤氮素的矿化量及矿化过程和水稻对矿化形成的铵态氮吸收量和吸收过程的综合反映.因此水稻土氮素供应量及氮素矿化过程是否适应和协调水稻生长发育的要求,对水稻能否获得高产稳产有密切联系.本试验就省内几种主要水稻土在一定温度下进行淹水密闭培养及无氮盆栽试验,以观察了解:(1)不
Rice nitrogen is the main source of soil organic nitrogen mineralization, even in the case of chemical nitrogen fertilizer in the case of high .I ~ room with (15) N tracer to prove that under field cultivation conditions, the rice seasoned More than 70% of the nitrogen nutrition comes from the soil. The characteristics of nitrogen supply in paddy soil are the amount of mineralization of soil nitrogen and the combination of mineralization process and rice nitrogen absorption and absorption process of mineralization Therefore, it is closely related to whether paddy soil nitrogen supply and nitrogen mineralization can adapt and coordinate the growth and development of rice, and whether rice can get high and stable yield.In this experiment, several main paddy soils in the province at a certain temperature Submerged airtight culture and nitrogen-free pot experiment to observe the understanding: (1) no