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芝麻对磷钾吸收较多,据试验每生产50公斤芝麻,需吸收五氧化二磷1—1.2公斤,氧化钾5.2公斤。花期正是吸肥高峰,占全生育期吸肥的40—60％。此期及时喷施磷酸二氢钾,能很快被茎叶吸收,输送到花果和根等部位,从而增加芝麻后劲,增加蒴果和粒重,提高含油量。 具体做法:选择晴天下午或傍晚进行喷施,以减少水分蒸发,促进叶片吸收。浓度以0.4％为宜,亩用量250—300
Sesame phosphorus and potassium absorption more, according to the test produced 50 kg of sesame seeds, need to absorb phosphorus pentoxide 1-1.2 kg, 5.2 kg of potassium oxide. Florescence is the peak of fat absorption, taking up 40-60% of the whole growth period. This period of time spraying potassium dihydrogen phosphate, can be quickly absorbed by stems and leaves, transported to the flowers and roots and other parts, thereby increasing sesame stamina, increase the capsule and grain weight, increase oil content. Specific approach: Select the sunny afternoon or evening spray, to reduce the evaporation of water and promote leaf absorption. Concentration of 0.4% is appropriate, the amount of 250-300 mu