CAJ | 학술논문

通过14个大田试验,研究了湖北省棉花P肥效应及适宜用量.结果表明,适量施用P肥对棉花具有明显的增产增收效果,14个试验施P处理比对照处理增产子棉100-896kg/hm2,平均增产347kg/hm2;施P处理增产率2.1%-25.2%,平均增产率为10.4%;施P处理纯利润平均为1764元/hm2,产投比平均为6.61;P肥偏生产力和农学利用率平均分别为P2O551.27kg/kg和P2O5 4.15 kg/kg.根据肥料效应方程,在当前生产条件下,棉花生产的P肥经济用量平均为P2O5 112.7 kg/hm2,推荐幅度为P2O5 42.9-183.2 kg/hm2.土壤有效P含量与棉花P肥经济推荐用量呈极显著负相关(r=-0.7628**,n=13),根据土壤有效P含量(x,单位为mg/kg)水平,湖北省目前棉花生产适宜用P量(y,单位为kg/hm2)可通过公式y=273.42-78.488In(x)求得.
통과14개대전시험,연구료호북성면화P비효응급괄의용량.결과표명,괄량시용P비대면화구유명현적증산증수효과,14개시험시P처리비대조처리증산자면100-896kg/hm2,평균증산347kg/hm2;시P처리증산솔2.1%-25.2%,평균증산솔위10.4%;시P처리순리윤평균위1764원/hm2,산투비평균위6.61;P비편생산력화농학이용솔평균분별위P2O551.27kg/kg화P2O5 4.15 kg/kg.근거비료효응방정,재당전생산조건하,면화생산적P비경제용량평균위P2O5 112.7 kg/hm2,추천폭도위P2O5 42.9-183.2 kg/hm2.토양유효P함량여면화P비경제추천용량정겁현저부상관(r=-0.7628**,n=13),근거토양유효P함량(x,단위위mg/kg)수평,호북성목전면화생산괄의용P량(y,단위위kg/hm2)가통과공식y=273.42-78.488In(x)구득.
A study was carried out in Hubei Province to evaluate the effects of phosphorus (P) fertilization rates on yield, economic benefit, P use efficiency and optimal P recommendation rate of cotton at 14 tested sites. The results revealed that the yield and profit of cotton significantly increased when P supplied moderately. The main results were as follows: (①ompared with the treatment without P fertilizer, the cotton yield of P application increased to 100 - 896 kg/hm2 for all treatments with an average increase of 347 kg/hm2. The increment rate ranged from 2.1% to 25.2%with the average rate of 10.4% for P application. ②The average net profit of the P application was 1764 Yuan/hm2 and the value to cost ratio was 6.61.③The average partial factor productivity of applied P (PFPP) and agronomic P use efficiency (APUE) were P2O5 51.27 kg/kg and P2O54.15kg/kg respectively. ④According to fertilizer response equations, the economical P application rate ranged from 42.9 kg/hm2 to 183.2 kg/hm2, and the average rate was 112.7 kg/hm2. It showed that the economical P application rate had a significantly negative correlation with soilavailable P level,and the economical P application rate of cotton could be gained through the equation y = 273.42 - 78.488 In(x) (here y means applied rate of P2O5, x means soil available P content) in Hubei Province.