威优64晚季种植的吸氮规律与施氮技术

来源 :杂交水稻 | 被引量 : 0次 | 上传用户:jc622
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
随着杂交早稻的推广,江西各地有相当面积改用威优64代替原来种植的中迟熟杂交晚稻。由于对晚季早熟组合的需肥规律认识不清、常有产量不稳定,肥料效益低的现象。如何根据早熟杂交晚稻吸氮特性合理施肥是生产中迫切需要解决的问题。为此,本试验研究了在不同施氮水平下,威优64的
其他文献
The elastic constants of the B1 structure NaCl under pressure are obtained by using the ab initio plane-wave pseudopotential density functional theory method.
期刊
本文对以高T_C超导薄膜为探测元的热敏红外探测器进行了理论分析和模拟设计.对影响器件性能的关键因素——热导G和电阻温度系数α,作了深入的理论分析,得到器件结构参数的最
We study theoretically the interference of a two-photon wavepacket in a beam splitter. We find that the spectrum symmetry for the two-photon wavepacket dominate
期刊
本文提出了一种基于专家经验的中医诊断不精确推理模型TRAM。该模型能够随着临床经验的积累提高其诊断能力,有很大实用价值。 This paper presents a TRAM model based on e
玉米笋,又称珍珠笋、娃娃笋。因其幼穗上尖下粗,形似竹笋而得名。这种食品清脆可口,别具风味,是一种高档蔬菜。由于含有丰富的纤维素和维生素 C,能预防食道癌和胃肠癌等症。
Using an isospin- and momentum-dependent hadronic transport model, we investigate effects of the symmetry energy on several collective flows in heavy-ion collis
期刊
We introduce a two-species symbiosis-driven growth model, in which two species can mutually benefit for their monomer birth and the self-death of each species s
期刊
We investigate theoretically the electron transport properties of a two-sublevel quantum wire irradiated by a strong laser field resonant with the quasiparticle
期刊
大豆灰斑病、病毒病是黑龙江省三江平原大豆的两大主要病害,给大豆生产造成很大损失。大豆灰斑病在一般发病年可减产5—12%,大发生年减产31%。感病籽实的脂肪、蛋白质含量均降
Discontinuous structural phase transition behaviour in seven kinds of liquid multiple component alloys are found by using a torsional oscillation viscometer.
期刊