Growth Trend of the Tectorial Planting of Potatoes in Eastern Hebei Province

In way of the combination of field experiment and indoor analysis,the growth trend of potato (Kexin No.1) in eastern Hebei province was studied under the condition of tectorial output 38 718 kg/hm~2.The results showed that the fresh weight and dry weight increased with the growth of the plants.Fresh and dry weight of the plants mainly increased in the period from March 17~(th) to May 31st, which were 44.36% and 34.35% of the total growth value.From April 16~(th) to May 16~(th),the dry matters were mainly distributed in the blade, then stems and branches,and the fewest in the tuber.After that,the distribution rate of dry matters to the tuber increased apparently.At harvest time,most dry matters produced by the plant were stored in tuber,which was 74.43% of the total dry weight of the plant.