CAJ | 학술논문

在宁夏灌淤土上,利用田间试验研究了氮、磷、钾各3个施肥水平对水稻(宁粳28号)产量、养分累积量及籽粒产量构成因素的影响.结果表明,施用氮、钾肥对水稻产量和养分累积有显著影响;水稻当季氮、磷、钾肥利用率都随着施肥量的增加而降低;穗数和每穗粒数随施氮量的增加而增加,而施磷肥有利于穗粒数的形成,过量施用氮肥还会显著降低水稻千粒质量.本试验水稻氮、磷、钾肥最佳经济施肥量分别为N 254.3、P_2O_5 150.8和K_2O 145.6 kg/hm~2,获得最高产量的最大施肥量组合分别为N 309.3、P_2O_5 253.9和K_2O 177.6 kg/hm~2.
재저하관어토상,이용전간시험연구료담、린、갑각3개시비수평대수도(저갱28호)산량、양분루적량급자립산량구성인소적영향.결과표명,시용담、갑비대수도산량화양분루적유현저영향;수도당계담、린、갑비이용솔도수착시비량적증가이강저;수수화매수립수수시담량적증가이증가,이시린비유리우수립수적형성,과량시용담비환회현저강저수도천립질량.본시험수도담、린、갑비최가경제시비량분별위N 254.3、P_2O_5 150.8화K_2O 145.6 kg/hm~2,획득최고산량적최대시비량조합분별위N 309.3、P_2O_5 253.9화K_2O 177.6 kg/hm~2.
A field experiment with paddy rice of Ningjing 28 was carried out to study the effects of different N, P_2O_5, K_2O rates on yield, total nutrient uptake, fertilizer using efficiency and characteristics factor of grain yield in irrigation-warping soil of Ningxia. The results showed that N and K_2O fertilizer application could insignificantly influence on the yield and total nutrient uptake of paddy rice. Nitrogen, phosphorus and potassium fertilizer using efficiency of paddy rice was decreased with fertilizer applied rates. Both ears and grain number per ear was increased with N applied rates, phosphorus fertilizer application could be benefit to increasing grain number per ear, overuse nitrogen fertilizer may decrease grain weight per 1000 seed. The optimal and economical N, P_2O_5, K_2O rate for paddy rice in irrigation-warping soil was N 254.3 kg/hm~2, P_2O_5 150.8 kg/hm~2, K_2O 145.6 kg/hm~2, and maximal N, P_2O_5, K_2O rate for maximal grain yield was N 309.3 kg/hm~2, P_2O_5 253.9 kg/hm~2, K_2O 177.6 kg/hm~2, respectively.