|
KMID : 1025520010430020267
|
|
Journal of Animal Science and Technology
2001 Volume.43 No. 2 p.267 ~ p.276
|
|
|
Optimum Time of Spring Sowing of Forage Repe , Oat and Rye for Chinese Cabbage - Soiling Forage Double Cropping System in the Taekwanryong Area
|
|
|
|
|
Abstract
|
|
|
|
The purpose of this study was to find out if Chinese cabbage cultivation field which is located in Pyongchang-Kun (850 m above the sea level) can be utilized for forage crops. Specifically, to determine its utility, the effects of the different spring seeding time on the agronomic characteristics, dry matter (DM) yield and nutritive values of rape, oat and rye were evaluated. The rape, oat and rye were assigned to main plots, and the different seeding times (early April, middle April, late April and early May) were randomly assigned to subplot; one more seeding time (early October) added only to rye. For all crops, harvests were done 80 days after seeding. However, due to their slow growth, the crops seeded on early April were harvested 90 days after seeding. Also, the rye seeded on early October was harvested on early June of the following year. The higher plant heights were observed on all crops seeded on middle April compared to the crops seeded on early April. However, this difference was not significant. The rye seeded both on early and middle of April had many soft leaves and not-emerged heads compared to the oat which had many rough and hard leaves and was in milk stage. The rye seeded on late April had too many leaves which made it look like orchardgrass. The rape. which was also seeded on late April. was in vegetative stage. The oat seeded on late April was in between milk and dough stage, and did not have many leaves. Their stems were stiff and the grains were abundant. The rape seeded on late April had the highest DM yield with 8.25 t/㏊. The oat seeded on middle April had the highest DM yield which was followed by oat seeded on early April. Late April seeded rye had the highest DM yield with 9.64 t/㏊, which was followed by middle April seeded rye with 8.94 t/㏊. The crude protein (CP) contents of rape, oat and rye were 27.2. 15.2, and 27.6%, respectively, which were a little higher than previous studies. The contents of neutral detergent fiber (NDF) and acid detergent fiber (ADF) were the highest in oat and the lowest in rape. The relative feed values (RFV) were premium in rape, grade 3 in oat and grade 2 in rye. Conclusively, considering the agronomic characteristics and DM yield, the optimum spring seeding time is for late April to early May for rape, middle April for oat. and late April for rye, respectively. These time could occur if Chinese cabbage is cultivated by middle August. However, if Chinese cabbage is cultivated on late July, the optimum spring seeding time would be middle April in all these crops.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|