On Amount of Nitrogen Fertilizer Applied in New Variety Sujing No.815 of Middle-season Jing Rice and Fertilization Method in Tillering Stage

The proper amount of nitrogen fertilizer was used in Sujing NO. 815 and the fertilization method in tillering stage was groped in the test for providing basis for its high-yield cultivation. [Method]Randomized block design was used in two field subtests: subtest of nitrogen fertilizer application and subtest of different balanced fertilizer applied in tillering stage. [Result] The nitrogen rate for the maximum yield of Sujing No. 815 was 270 kg /hm2. Application of balanced fertilizer increased the amount of productive tillers,but decreased the number of grain per ear,and finally influenced its yield formation. [Conclusion]The proper nitrogen rate applied in high-yield cultivation of Sujing No.815 by manual transplanting was 270 kg /hm2. And tillering stage dressing should be applied enough once and balanced fertilizer application wasn't required.