论文部分内容阅读
问:油菜的需肥量和各生育期的需肥规律如何? 答:冬油菜在我省秋季九、十月播种,第二年夏初成熟,生育期较长,枝叶繁茂,是需肥较多的作物。据中国农科院油料研究所等单位分析,亩产200—300斤左右菜籽的甘蓝型油菜,每生产100斤菜籽,大约需吸收氨9—11斤,五氧化二磷3—3.9斤,氧化钾8.5—12.8斤,氮、磷、钾比例约为1:0.5:1。但不同品种类型吸肥能力不同,甘蓝型油菜比白菜型油菜需肥量多,丰
Q: Rape need fertilizer amount and the law of fertility in each growth period how? A: Winter rapeseed in the autumn of September, October seeding, mature in the second year early summer, longer growing period, lush foliage is to be fat Many crops. According to the Chinese Academy of Agricultural Sciences Oil Institute and other units, about 200-300 pounds per mu yield of rapeseed rape, 100 pounds of rapeseed production, about absorption of ammonia 9-11 pounds, phosphorus pentoxide 3-3.9 pounds , Potassium chloride 8.5-12.8 kg, nitrogen, phosphorus and potassium ratio of about 1: 0.5: 1. However, different types of different absorption capacity of different types of oil, Brassica napus need more fertilizer than cabbage, abundance