论文部分内容阅读
为揭示不同施氮量对北疆复播大豆光合生理及产量的影响,以黑河43为试验材料,大田滴灌条件下设置了不施氮(N0)、150 kg hm~(-2)(N1)和225 kg hm~(-2)(N2)3个处理,研究施氮量对复播大豆叶面积指数(LAI)、叶绿素含量(SPAD值)、光合速率、蒸腾速率等光合参数及产量的影响。结果表明,各处理复播大豆的LAI、SPAD值在其整个生育期内均表现为:N1>N2>N0;与N0相比,N1、N2的叶片净光合速率(P_n)、气孔导度(G_s)、蒸腾速率等(T_r)及气孔限制值(Ls)均有所增加,且各指标N1均高于N2;各处理不同生育时期胞间CO2浓度(Ci)为N0>N2>N1,叶片水分利用效率(WUEL)为N1>N0>N2。产量以N1最高,为3841.23 kg hm~(-2),分别比N0、N2处理增加了24.46%、9.04%,差异显著(P<0.05)。在本试验条件下,北疆复播大豆的适宜施氮量为0~150 kg hm~(-2)之间。
In order to reveal the effects of different nitrogen rates on the photosynthetic physiology and yield of seeding soybean in northern Xinjiang, nitrogen (N0), nitrogen (150) kg hm -2 (N1) And nitrogen (225 kg hm -2) on the photosynthesis parameters such as leaf area index (LAI), chlorophyll content (SPAD value), photosynthetic rate and transpiration rate of the resynthesized soybean . The results showed that the LAI and SPAD values of soybean in all treatment showed: N1> N2> N0; compared with N0, the net photosynthetic rate (P_n) and stomatal conductance G_s), transpiration rate (T_r) and stomatal limitation (Ls) increased, and each index N1 was higher than N2. The intercellular CO2 concentration (Ci) at different growth stages was N0> N2> Water use efficiency (WUEL) is N1> N0> N2. The highest yield of N1 was 3841.23 kg hm -2, which increased by 24.46% and 9.04% respectively compared with N0 and N2 treatment, the difference was significant (P <0.05). Under the conditions of this experiment, the suitable nitrogen application rate of soybean planted in North Xinjiang ranged from 0 to 150 kg hm -2.