问题 问答题 简答题

温度对生物肥料的效果有影响吗?

答案

参考答案:

我们知道,农作物生长是否良好,与土壤温度有十分密切的关系。而土壤温度的高低对微生物肥料的效果发挥也有很大影响。微生物肥料与化学肥料最大的区别就是它以“活”的微生物为主体。既然是活的微生物,其肥效高低好坏就受到肥料中有益微生物的“活跃活泼程度”和“繁殖能力”及“繁殖快慢”的影响,“活泼好动”、“子孙成群”、“争做贡献”的有益微生物越多,肥效就越大。一定情况下,土壤温度决定着微生物菌肥的肥效发挥。

不同植物种类对土壤温度的要求是不一样的,有耐寒、半耐寒、喜温、耐热等类型,不同温度类型有着对气温和地温的具体要求范围。土壤的导热率低于空气,因此“地温”比“气温”要相对稳定得多,气温变化大,地温变化较小。一般来说,地温在15-28℃之间微生物肥效反应最好,而低于10℃高于30℃的地温,微生物肥的肥效反应较差。地温偏低,微生物不活跃,根系生长也受到抑制,厂家技术不过关、适应能力差的微生物菌种就会“患感冒”;地温偏高,加快了根部的呼吸,但也加速了根的衰老过程,由于根的衰老,对土壤水分、养分的吸收能力降低,导致了植株早衰,微生物肥效的直观效果也受到影响。适宜的温度能使有益微生物倍增效益,放大贡献。

三一专用生物肥中的有益微生物菌种,经长期严格的高科技提纯复壮工艺,体格健壮,加之芽孢的保护作用,其抗逆性大大增强,对温度变化的适宜性远比同类产品高出许多,同类微生物还在患“感冒”甚至一命归西,而三一专用生物肥中的有益微生物却在正常工作。这也是三一专用生物肥效果一贯稳定的原因。

阅读理解
阅读理解。
  There are all kinds of trains in the world. There are trains to carry people, trains to carry animals
or carry things. There are fast trains and slow ones. Some trains go through hills.   
     In big cities, the streets are usually very busy. So you can find trains under the ground and trains
on a rail above the streets. They carry people quickly in and out of the city.   
     Can a train run over water? Yes, it can. There are many bridges over the rivers. The trains can
easily run over the water. But it is not easy to build the bridges. Today's trains have dining-rooms for
people. You may eat something in them on the way if you are hungry. Trains are useful to men, women
and children. Many children have model trains. With the model trains they can build their own rails and
enjoy the wonderful world of trains.
1. There are all kinds of trains. Here "all kinds of trains" means ______.   
[ ]
A. fast trains and slow trains   
B. many different kinds of trains   
C. trains to go through hills   
D. trains to carry people
2. The trains carry people in and out of the big cities under the ground and on a rail above the streets 
    because ______.   
[ ]
A. the streets are very busy    
B. the cities are big   
C. the trains have dining-rooms  
D. the cities are too small
3. If you are hungry, you may go to ______ of the train to have something to eat when you are
    travelling by train.   
[ ]
A. some rooms           
B. some shops   
C. the dining-room         
D. the station
4. It's             for trains to run over the water but ______ to build bridges.   
[ ]
A. easy, easy           
B. easily, not easy   
C. difficult, easily        
D. easy, difficult
多项选择题