【摘 要】
：
影响棉花钾肥肥效的原因很多,但主要取决于土壤自身供钾能力和栽培技术水平。近年来,随着棉花产量的提高,氮磷化肥用量剧增,加之有机肥料用量的减少,棉花从土壤中吸取的钾素
【机 构】
：
湖北省黄冈县土肥站,湖北省黄冈县土肥站
论文部分内容阅读
影响棉花钾肥肥效的原因很多,但主要取决于土壤自身供钾能力和栽培技术水平。近年来,随着棉花产量的提高,氮磷化肥用量剧增,加之有机肥料用量的减少,棉花从土壤中吸取的钾素,未能得到补充,从而引
There are many reasons that affect the efficiency of cotton potash fertilizer, but mainly depend on the soil potassium supply capacity and cultivation techniques. In recent years, with the increase of cotton yield, the amount of nitrogen and phosphorus fertilizer increased sharply, combined with the reduction of the amount of organic fertilizer, cotton from the soil to absorb the potassium, failed to be supplemented, leading to
其他文献
Photovoltaic (PV) effects for red bright organic light-emitting diodes (OLEDs) in which the red light emitted from the dopant 4-(dicyanomethylene)-2-t-butyl-6-
Characteristics of frequency difference tuning of Zeeman-birefringence He-Ne dual frequency lasers (ZBDFLs) are explored. We design an automatic system of tunin
我所在总结大豆亩产400斤基本经验基础上,开始探索亩产500斤大豆的生育规律和综合技术。自1980年以来连续四年亩产在450斤以上,最高亩产达528.6斤。1981年五个点平均亩产492
We report our lattice simulation on the charmonium spectra in the quenched approximation. Because the complete adjustment on all the nonperturbative parameters
同一栽培种品种间的酯酶同工酶酶谱没有差异,同一染色体组的种电泳迁移率相同的酶带有较多的趋势,不同种的酶谱是不同的。根据酶谱分析亲缘关系,A染色体组与D染色体组比较接
Based on the recent progress in the spherical torus approach (ST), it is meaningful to revisit the possibility of establishing D-3He fusion reactor using both t
Imaginary-distance beam propagation method under the perfectly matched layer boundary condition is applied to judge single-mode behaviour of optical waveguides,
Cubic Mgo.55Zno.45O thin film alloys have been deposited on Si substrates at low growth temperature. The topography of the cross section of the epitaxial film b
The property of quantum nonlocality in the atom-field coupling system via degenerate Raman processes with cavity damping is investigated. It is found that if th
We present a numerical study on the patte formation in a two-dimensional vibrated granular layer by a molecular dynamics algorithm. Through analysing the granul