鄂西山区玉米不同磷钾用量对产量及养分累积的影响  

Effects of Different P and K Fertilizers Dosage on Maize Yield and Nutrient Accumulation in Northwest of Hubei Province

作　　者：徐祥玉[1,2] 彭成林[1,2] 袁家富[1,2] 赵书军[1,2] 韩庆忠 向琳 王功明 刘晔[1,2] 

机构地区：[1]湖北省农业科学院植保土肥研究所 [2]湖北省农业科技创新中心植保土肥分中心,武汉430064 [3]湖北省秭归县农业技术推广中心,湖北秭归443600

出　　处：《湖北农业科学》2010年第12期3011-3014,共4页Hubei Agricultural Sciences

基　　金：湖北省农业科技创新中心资助项目(2007-620-001-03)

摘　　要：在固定氮肥用量情况下研究了鄂西北山区磷钾不同配比组合对玉米产量及养分累积的影响。结果表明,在45～75kg/hm2磷肥用量下,增施钾肥有利于提高功能叶面积;在75～120kg/hm2钾肥用量下,增施磷肥到P3可以提高株高和穗位高;钾肥可通过提高穗位叶宽来提高穗位叶面积。子粒产量以NP1K1最高,非收获生物量以NP1K3最高。最高产量施钾量为132.75kg/hm2,施磷量为59.40kg/hm2。NP1K1处理子粒磷累积、总磷累积最高。NP2K3处理地上部钾累积量最大,但钾收获指数最小。在P2、P3水平下施钾量越高钾累积越高。A field experiment was carried out to study the effects of different P and K fertilizers dosage on maize yield and nutrient accumulation in northwest of Hubei province. The results indicated that the function leaf can increase as K rate elevate at the P rate of 45～75kg/hm^2, the altitude of stem length and spike bit were promoted as P rate elevate at the K rate of 75～120 kg/hm^2. K fertilizer could increased functional leaf area through promoting the width of functional leaf. Grain yield was highest in the NP1K1 treatment and un-grain yield in NP1K3. In highest grain yield, K fertilizer rate was 132.75 kg/hm^2 and P fertilizer rate was 59.4 kg/hm^2. Grain P accumulation and total P accumulation was highest in the NP1K1 treatment. Aboveground part accumulation of K was highest in the NP2K3 treatment, but harvest index of K was least. The higher the K rate, the more K accumulation at P2 and P3 levels.

关 键 词：玉米 磷钾用量 养分吸收 

分 类 号：S513.062[农业科学—作物学]