问题 问答题 简答题

简述烤烟大田需水规律和需肥规律?

答案

参考答案:

烟草的需水规律是:移栽期间需水较多,土壤湿度大,且光照弱,蒸发量小,一般月降雨量100mm左右有利于还苗成活;成活后,烟株尚小,耗水量少,天气晴朗,土壤水分宜少,有利于根系向纵横方向发展,为旺长打基础,月降雨量以80-100mm为宜;团棵后耗水量大,充足的水分,有利于烟株旺盛生长,获得较好的产量,月降雨量150-200mm为宜,烟株进入成熟阶段后,需要多晴少雨,适当干燥的环境,有利于烟叶成熟和调制,提高品质,此时期月降雨量以100mm为佳。烟草的需肥规律:烟苗移栽后,到旺长前即栽后25-30天内,对肥料吸收量不大,30天后逐渐上升,大量吸收期在移栽后45-75天,这一时期,N吸收量占烟株总吸收量的44.12%,P205占有50.74%,K20占59.18%,以后吸收量即逐渐下降,但对P205吸收量在最末一次采收前的半月内又稍上升,达总吸收量的14.5%。N、P的吸收高峰在移栽后40-60天,K在40-65天,总的来说,吸肥高峰在40-65天之内,以后急剧下降,因此,在烟苗吸收肥料高峰之前施用适量的肥料,而在此以后,烟草不应再留有较多的可给态肥,以便落黄成熟,做到“少时富、老来穷”。

单项选择题

Public speaking fills most people with dread. Humiliation is the greatest fear; self-exposure and failing to appeal to the audience come a close second. Women hate it most, since girls are pressurized from an early age to be concerned with appearances of all kinds.

Most people have plenty of insecurities, and this seems like a situation that will bring them out. If parents, teachers or peers mocked your foibles as a child, you fear a repeat. If you were under pressure to be perfect, you are terrified of failing in the most public of ways.

While extroverts will feel less fear before the ordeal, it does not mean they will necessarily do it better. Some very shy people manage to shine. In fact, personality is not the best predictor of who does it well. Regardless of what you are like in real life, the key seems to be to act yourself.

Actual acting, as in performing the scripted lines of a character other than yourself, does not do the job. While politicians may limit damage by having carefully rehearsed, written screeds to speak from, there is always a hidden awareness among the audience that the words might not be true.

Although, as Earl Spencer proved at his sister Princess Diana’s funeral, it is possible both to prepare every word and to act naturally, a script rarely works and it is used as a crutch by most people. But, being yourself doesn’t work either. If you spoke as if you were in your own kitchen, it would be too authentic, too unaware of the need to communicate with an audience.

I remember going to see British psychiatrist RD Laing speak in public. He behaved like a seriously odd person, talking off the top of his head. Although he was talking about madness and he wrote on mental illness, he seemed to be exhibiting rather than explaining it.

The best psychological place from which to speak is an unselfconscious self-consciousness, providing the illusion of being natural. Studies suggest that this state of "flow", as psychologists call it, is very satisfying. Whether in normal life or making speeches, the key is to remind yourself that, contrary to what your teachers or parents may have implied, your best is good enough. In the zone, a strange place of authentic falsehood and shallow depth, play is possible.

The example of the British psychiatrist in Paragraph 6 shows a failure in ().

A. showing modesty in public

B. talking about one’s own trade

C. presenting the topic logically

D. communicating with the audience

填空题