■磷营养和激素浓度均影响作物产量形成。确定磷与GA3的交互作用对旱地油料亚麻的产量和磷利用效率具有协同作用。这对提高籽粒产量和磷利用效率具有极其重要的意义。
■于2019年和2020年在定西油料作物试验站进行了田间试验,研究了磷的影响,赤霉素(GA3),及其相互作用对油料亚麻籽粒产量和磷利用效率的影响。磷肥以三个水平(0、67.5、135kgP2O5·ha-1)施用,GA3也以三个浓度(0、15和30mg·L-1)喷洒。
■结果表明,施用67.5kgP2O5·ha-1降低了叶片酸性磷酸酶(ACP酶)活性,但是在整个生长期增加了磷的积累,1000内核重量(TKW),和每个胶囊的颗粒数。喷施GA3显著提高叶片ACP酶活性,花后磷的积累及其对籽粒的贡献,磷利用效率,每株植物的胶囊数量,和TKW。花期磷的积累,内核,施肥67.5kgP2O5·ha-1和喷施30mg·L-1GA3处理的成熟期增加了56.06%,73.51%,和62.17%,分别,与对照相比(无磷,没有GA3)。花后磷的积累及其对子粒的贡献也有所增加。67.5kgP2O5·ha-1与30mg·L-1GA3和135kgP2O5·ha-1与15mg·L-1GA3结合均显着提高了油料亚麻的籽粒产量,在两年内达到1696公斤·ha-1和1716公斤·ha-1,分别。它们之间没有显著差异。然而,前处理显著提高了表观利用率,农艺利用率,和磷的部分生产率。磷与GA3的交互作用对籽粒产量影响显著。
■因此,67.5kgP2O5·ha-1与30mg·L-1GA3组合施用是一种有效的施肥方法,可提高实验区和其他类似地区的油料亚麻生长和谷物产量。
UNASSIGNED: Phosphorus nutrition and hormone concentration both affect crop yield formation. Ascertaining the interaction of phosphorus and GA3 has a synergistic effect on the grain yield and phosphorus utilization efficiency of oilseed flax in dryland. It is extremely important for improving grain yield and phosphorus utilization efficiency.
UNASSIGNED: A field experiment was conducted in 2019 and 2020 at the Dingxi Oil Crops Test Station to investigated the effects of phosphorus, gibberellin (GA3), and their interaction on the grain yield and phosphorus-utilization efficiency of oilseed flax plants. Phosphorus fertilizer was applied at three levels (0, 67.5, 135 kg P2O5·ha-1) and GA3 was also sprayed at three concentrations (0, 15, and 30 mg·L-1).
UNASSIGNED: The results showed that application of 67.5 kg P2O5·ha-1 reduced leaves acid phosphatase (ACPase) activity, but increased phosphorus accumulation throughout the growth period, the 1000-kernel weight (TKW), and the number of grains per capsule. Spraying GA3 significantly increased the leaves ACPase activity, phosphorus accumulation after anthesis and its contribution to grain, phosphorus-utilization efficiency, the number of capsules per plant, and TKW. The phosphorus accumulation at the anthesis, kernel, and maturity stages under the treatment of fertilizing 67.5 kg P2O5·ha-1 and spraying 30 mg·L-1 GA3 were increased by 56.06%, 73.51%, and 62.17%, respectively, compared with the control (no phosphorus, no GA3). And the phosphorus accumulation after anthesis and its contribution to grain also increased. 67.5 kg P2O5·ha-1 combined with 30 mg·L-1 GA3 and 135 kg P2O5·ha-1 combined with 15 mg·L-1 GA3 both significantly increased grain yield of oilseed flax, reaching 1696 kg·ha-1 and 1716 kg·ha-1 across two years, respectively. And there was no significant difference between them. However, the former treatment significant increased the apparent utilization rate, agronomic utilization rate, and partial productivity of phosphorus. The interaction between phosphorus and GA3 was significant for grain yield.
UNASSIGNED: Therefore, the application of 67.5 kg P2O5·ha-1 in combination with 30 mg·L-1 GA3 is an effective fertilization approach for enhancing oilseed flax growth and grain yield in the experiment region and other similar areas.