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Applying P and Zn fertilizer to promote riceyield has been common in Yunnan Province fora long time. We conducted an experiment atRice Res Inst of Yunnan Agri Univ, Kunming(25°N, 109°E, 1950 msl) where the land islow in P and Zn, to observe the effects of Znand P fertilizer on the grain yield and qualitiesof rice. The experiment was designed as astrip split-split plot which consisted of threefactors, namely two levels of Zn application (0and 5 kg Zn/hm~2 as ZnSO_4·7H_2O for topdressing) as the main plot, three levels of Papplication (60, 150, and 200 kg P_2O_5/hm~2 as
Applying P and Zn fertilizer to promote rice field has been common in Yunnan Province fora long time. We conducted an experiment at Rice Res Inst. Yunnan Agri Univ, Kunming (25 ° N, 109 ° E, 1950 msl) where the land islow in P and Zn, to observe the effects of Zn and P fertilizer on the grain yield and qualities of rice. The experiment was designed as astrip split-split plot which consisted of threefactors, namely two levels of Zn application (0 and 5 kg Zn / hm ~ 2 as ZnSO 4 · 7H_2O for topdressing) as the main plot, three levels of Papplication (60, 150, and 200 kg P_2O_5 / hm ~ 2 as