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- Abstract: The SPAD - 502 chlorophyll meter appears promising for rapid, on-farm analysis of crop nitrogen status. 文章摘要: 叶绿素仪（SPAD-502）的出现使通过无损伤的田间速测对作物进行氮营养诊断成为可能。
- The SPAD-502 chlorophyll meter appears promising for rapid,on-farm analysis of crop nitrogen status. 摘要 叶绿素仪(SPAD-502)的出现使通过无损伤的田间速测对作物进行氮营养诊断成为可能。
- The soil nitrogen status is a function of the processes of nitrogen fixation, microbial decompostion, nitrificattion and denitrification. 土壤氮状况是一个固氮、微生物分解、硝酸化和脱氮过程的作用。
- The soil nitrogen status is a function of the processes of nitrogen fixation, microbial decomposition, nitrification and denitrification. 土壤氮状况是一个固氮、微生物分解、硝酸化和脱氮过程的作用。
- Many researches have shown the correlations between nitrogen status and growth rate, photosynthesis, and performances of shoots and roots of plants. 许多研究成果指出，植物体含氮量与生长速率、光合作用速率与地上部及地下部形态具有相关性。
- It suggests that chlorophyll meter is a suitable tool for the assessment of chlorophyll and nitrogen status in plants of Amaranth mangostanus. 综合本研究结果，显示叶绿素测计可利用于估测苋菜植体叶绿素及氮素状态，具有应用于苋菜氮肥管理之潜力。
- For a purpose of further improving the precision of nitrogen status diagnosed by SPAD-502 meter and fertilizer recommendation, few questions need to be settled was put forward. 提出进一步提高利用SPAD-502叶绿素计诊断水稻氮素营养状况与推荐追肥精度尚需解决的几个问题。
- Liu Hong-bin,Zhang Yun-gui,Li Zhi-hong,et al.Application of canopy spectral reflectance in monitoring Nitrogen status of winter wheat[J].Scientia Agricultura Sinica,2004,37(11):1743-1748. [4]刘宏斌;张云贵;李志宏;等.;光谱技术在冬小麦氮素营养诊断中的应用研究[J]
- In addition, the effect of nitrogen status on leaf SPAD was quantified by the value of leaf nitrogen concentration, and the relationship between SPAD and RGB was described with linear equation. 并基于叶片氮含量表达了氮素供应水平对叶片SPAD值变化规律的影响，同时用线性方程描述了叶片SPAD值与RGB值之间的定量关系。
- The diphenylamine method could indicate the nitrogen status in plant which changed with the different rate of nitrogen fertilizer application. it is more suitable to be used in the practice. 而二苯胺法测定结果可以反映作物体内硝态氮含量随施肥量变化情况，并且由于其快速、简便的特性，更适于在生产中推广应用。
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- The consulate was upgraded to embassy status. 该领事馆已升格为大使馆。
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- He is a person of important social status. 他是一个有重要社会地位的人。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- You don't really care a fig about status. 你对地位真是一点儿也不在乎。
- An advancement, especially in social status. 攀升提升，尤指在社会地位上
- He had tried hard to better his status, but failed. 他努力设法改善自己的地位,但未能成功。
- I don't really care a fig about status. 我一点不在乎地位。
