【摘 要】
：
本试验采用“3414”施肥方案设计,对不同氮、磷、钾水平下的大白菜产量及养分最佳投入量进行分析,通过肥料效应方程对氮、磷、钾的肥料效应进行分析,结果表明采用一元二次模
【机 构】
：
北京市顺义区农科所,北京市顺义区农科所,北京市顺义区农科所,北京市顺义区农科所,北京市顺义区农科所,北京市顺义区农科所 北京101300,北京101300,北京101300,北京101300,北京10
论文部分内容阅读
本试验采用“3414”施肥方案设计,对不同氮、磷、钾水平下的大白菜产量及养分最佳投入量进行分析,通过肥料效应方程对氮、磷、钾的肥料效应进行分析,结果表明采用一元二次模型拟合,最佳施氮量为14.78kg/667m2,最佳产量为7078.6kg/667m2,最佳施五氧化二磷量为5.84kg/667m2,最佳产量为6973.69kg/667m2,最佳施氧化钾量为12.20kg/667m2,最佳产量为7230.2kg/667m2。
In this experiment, the design of “3414” fertilization scheme was used to analyze the yield and nutrient input of Chinese cabbage at different N, P and K levels. The fertilizer effects of N, P and K were analyzed through the fertilizer effect equation, The results showed that the best one was 14.78kg / 667m2, the best yield was 7078.6kg / 667m2, the best phosphorus pentoxide content was 5.84kg / 667m2 and the best yield was 6973.69kg / 667m2, the optimum amount of potassium oxide is 12.20kg / 667m2, the best yield is 7230.2kg / 667m2.
其他文献
采用热压烧结法制备了ZrCP/W复合材料环形试样,测试了该复合材料试样在发动机试车条件下的热震烧蚀性能.结果表明:ZrCP/W复合材料具有良好的抗热震和耐烧蚀性能,试验后试样整
With the combination of three land surface models (LSMs) and the ensemble Kalman filter (EnKF), a multimodel EnKF is proposed in which the multimodel background
Background Allergen micro-arrays are powerful tools for screening of serum IgE-reactivity.In this study allergen micro-arrays were used to identify dominating I
The mechanism of vegetation restoration on degraded karst regions has been a research focus of soil science and ecology for the last decade. In an attempt to pr
Observations collected in the Badan Jaran desert hinterland and edge during 19-23 August 2009 and in the Jinta Oasis during 12-16 June 2005 are used to assess t
本文结合高速公路路面工程的施工实践,分析了滑模施工中水泥混凝土路面平整度的影响因素,并提出了提高高等级公路水泥混凝土路面平整度的有力措施,对水泥混凝土路面的施工有
在大跨度柱支承钢网格结构的橡胶支座中设置锚栓,能有效防止屋盖在极端情况(如罕遇地震、负风压)下脱离出支承柱.为了不妨碍橡胶垫在正常使用条件下变形,在锚栓和锚孔之间留
Betaphycus gelatinus, Kappaphycus alvarezii and Eucheuma denticulatum of Family Solieriaceae, Order Gi-gartinales, Class Rhodophyceae are three important carrag
利用 FFT变换进行谐波分析 ,非整周期采样会带来较大的误差。传统的解决方法是采用频率跟踪技术实现采样的整周期性。提出了一种新的解决方法 ,有效的利用计算机的计算能力 ,
文件生命周期理论从产生、发展直至成熟,都蕴涵着历史主义的思想,一直以来受到档案学界的广泛关注,面对电子文件时代的挑战,这种思想仍然是文件生命周期理论的核心。
The th