返回Google圖書搜尋

Physiology of Forage Maize (Zea Mays L.) in Relation to Its Production and Quality

出版	na, 1983
URL	http://books.google.com.hk/books?id=RjchAQAAMAAJ&hl=&source=gbs_api

註釋Yield potential of forage maize have increased considerably in North-West Europe during recent decades. This has been achieved by breeding and introducing new hybrids and by improving cultivation techniques. The proportion of ear in the dry matter and the proportion of dry matter in the fresh crop have mainly increased because of changes in cultivation techniques. However, new introduction of forage maize have proved to be less digstible. There is a general lack of fundamental understanding about the factors affecting the production pattern and the developement over time of digestibility and dry-matter content of forage maize. This thesis describes research carried out in order to contribute to this understanding. General aspects of productivity: Maize has certain ecophysiological characteristics that make it less suitable for cultivation in North-West Europe. The thermophilic nature of the plant is the most important. The soil and air tempeartures during the first weeks after sowing are crucial for final dry-matter yield. After this period, productivity greatly depends on tempearture, light intensity and availability of water. These factors determine the rate of production and the length of the period during which production is possible, Conditions during flowering and light intensity after silking often restrict and curtail the productivity. In The Netherlands, the weather is generally more favourable during the late vegetative growth and developement of the influorescences than during pollination, (...).