Table of Content

10 April 1993, Volume 14 Issue 02

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The Effect of Silver-film Covering on the Yield and Quality of apple Fruits

Zhang Xieqin Jiang Yonghe Zhong Yanghe Ma Rcnyi Zhang Li(Beijing agricultural University)

1993, 14(02):  25-28. 

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Through the determination and analysis of single leaf photosynthesis condition of Sparkling Apple, the regulation of photosynthesis varied with the luminous intensity was understood. We investigated the distribution of irradiation within the canopy of apple trees and suggested both single fruit weight and yield could increase through the increase of photosynthetic activity by the use of silver-film to cover the soil surface which largely increased irradiation within the canopy and improved the light receiption of the canopy. In addition, the fruit quality was also improved by the use of this kind of technique.

Experimental Studies on the Relations Between Atmospheric Electrical Field and Electric Current of Plant Nutrient Transportation

1993, 14(02):  40546-405. 

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Atmospheric electrical field is an important weather factor affecting plant growth. Changed atmospheric field is a key factor of plant nutrient transportation. When the variation rate of field intensity is more than zero, plants absorb negative ions and form a downward plant nourishment transport electric current; while the variation rate is below zero, plants absorb positive ions and form a upword plant electric current.