What are the advantages and disadvantages of soilless culture?

无土栽培有什么优缺点?

Please discuss the advantages and disadvantages of soilless culture?

请结合实际谈谈无土栽培有什么优点和缺点.

Six organic manures were used to apply to celery and romaine lettuce in soilless culture.

采用基质栽培试验研究了不同有机肥种类对叶类蔬菜(芹菜和生菜)硝酸盐和营养品质的效应.

Compared with the inorganic nutritional liquid soilless culture, the investment can be saved by more than70%.

较无机营养液无土栽培可节省投资70％以上。

There are also formulae with added trace elements for use with soilless mixes and these are very beneficial.

还有一些肥料里面添加了微量元素，是专门为无土介质设计的，很有用。

Which environmental factors must be considered while regulating and controlling the environment of soilless culture?

对无土栽培的环境设施调控,应考虑哪些主要的环境因素?

Introduced the eco-organic soilless culture system and culture management techiques of high yields of Oenanthe Javanica DC.

介绍了水芹有机生态型无土栽培系统的建立，以及栽培管理技术要点。

What measures should be taken while vegetables are planted in soilless culture during hot summer in tropic or subtropic areas such as in Guangdong Province?

你认为在广东等热带、热带地区炎热的夏季进行无土栽培蔬菜生产，可能要采取什么措施？ 收藏。

Reed residue substrate, a new organic substrate made from solid wastes of paper-mill, was developed and extended in East China as peat alternative for soilless culture and nursery production.

以造纸废弃芦苇末再生合成的芦苇末基质是正在华东地区推广以替代草炭的本土化有机基质。

In horticultural applications, perlite is used throughout the world as a component of soilless growing mixes where it provides aeration and optimum moisture retention for superior plant growth.

在园艺应用，珍珠岩是用来作为在世界各地的一个组成部分无土混合增长，提供最佳的通风和湿度保持优势植物生长。