查询词典 urea

First, the proportion of N : P : K was calculated out equaling 7.0 : 7.0 : 7.0 after urea, organic fertilizer, humic acid, calcium dihydrogenphosphate ammoniate, potassium sulfate and diatomite used for raw materials.

首先以尿素、有机肥、腐殖酸、氨化普钙，硫酸钾、硅藻土为原料，初步计算出N：P：K=7.0：7.0：7.0的理论配方比；然后以氨化普钙中的含磷量为依据，计算出所需各种原料的用量；最后将一定量的各种原料混合均匀后，烘干、挤压成型就得到缓释复合肥。

A cultured experiment is conducted in laboratory to study the effect of weathered coal and boron on the ammonification and nitrification of urea and on phosphourus availability.

氮肥中脲酶抑制剂和硝化抑制剂的应用，是提高氮肥利用率比较成功的例子。

The characteristics of nitrogen fixation, ammonification , nitrification and denitrification in coastal zones;2. Study on ammonification rate and slow release performance of urea;3. The results indicate that, with HRT of 8?h and temperature of 35℃, the COD removal rate is beyond 80%, the removal rate of TN about 8%, the ammonification rate of organic nitrat.

试验表明：厌氧附着膜膨胀床反应器处理乳品废水，在水力停留时间为8h、中温35℃条件下，COD去处率达到80%以上，对总氮的去除约为8%，出水有机氮的氨化率达70%以上，ρ/ρ由进水的0 5提高到0 8以上。

An enzyme that promotes the hydrolysis of urea to form ammonium carbonate.

核酸酶水解核酸的酶，如核酸内切酶和核酸外切酶

"When urea is added to soils it is converted rapidly to ammonium carbonate by hydrolysis, a reaction which is activated by enzyme urease."

尿素施人土壤后很快水解成碳酸铵。这是由尿素酶催化的一种化学反应。

This primary conversion of urea to unstable ammonium carbonate occurs very quickly near the soil surface The following equation illustrates the process

尿素主要在土表转化成不稳定的碳酸铵，转化速率很快，可用以下反应式表示

However, at 150 and 200 kg ha-1 rates, urea was about 90% as effective as ammonium nitrate.

而在施N量为150和200公斤/公顷时，尿素的效果达到硝铵的90%。

Only in April and May was urea as good as ammonium nitrate.

只有在4~5月份，施尿素才和施用硝铵的效果一样。

At lower rates of nitrogen （50 and 100 kg ha-1）, urea was only about 65% as effective as ammonium nitrate.

在低氮量（50和100公斤N/公顷）情况下，尿素的施用效果只有硝铵的65%。

This highlights the excessive nature of the common practice of split applying high rates of ammonium nitrate or urea.

作者指出，适于引起淋失的环境条件加上高降雨量，可能使施用控释氮肥的好处更加明显。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。