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丘陵红壤地种植的红麻,其主茎日高生长量具有两个旺长高峰,它的出现并不是麻株自身的生长特性,而主要是由于红壤地间歇干旱等原因所造成。因为其高峰期正好出现在土壤水分含量的3个高峰之间鞍部区域的前沿。测定表明,伏旱季节红麻苗,在0～10 cm的土壤水分含量,若高于14％仍可正常生长,如低到10％～11％即会产生萎蔫现象。试验结果还表明,每公顷施N 180kg、P_2O_590ks、K_2O270kg和N 180kz、P_2O_560kg、K_2O300kg的两个处理,在萎蔫含水量、根系生长、抗旱能力、经济性状总效应等方面的表现,均比其它处理为佳。因此,为红麻水肥管理,特别是氮磷钾的用量和配比提供了实践依据。
The kenaf grown in the hilly red soil had two peak height growths per day. Its emergence was not caused by its own growth characteristics, but mainly due to the intermittent drought in the red soil. Because its peak occurs exactly at the front of the saddle region between the three peaks of soil moisture content. The results showed that in the drought season, kenaf seedlings could grow normally if the soil water content was above 10% at 0 ~ 10 cm. For example, as low as 10% ~ 11%, the wilting phenomenon would occur. The results also showed that the treatments of N 180kg, P 2 O 5 590ks, K 2 O 2 70kg and N 180kz, P 2 O 5 560kg and K 2 O 300kg per hectare showed better performance than other treatments in water content, root growth, drought resistance and economic effects Better. Therefore, it provides a practical basis for the management of kenaf water and fertilizer, especially the amount and proportion of nitrogen, phosphorus and potassium.