水氮耦合及种植密度对绿洲灌区玉米光合作用和干物质积累特征的调控效应

魏廷邦,柴强,王伟民,王军强

Effects of Coupling of Irrigation and Nitrogen Application as well as Planting Density on Photosynthesis and Dry Matter Accumulation Characteristics of Maize in Oasis Irrigated Areas

WEI TingBang,CHAI Qiang,WANG WeiMin,WANG JunQiang

表2 不同处理玉米干物质积累速率的Logistic 方程回归分析

Table 2 Logistic equation analysis on dry matter accumulation of maize under different nitrogen treatments

年份 Year	处理 Treatment	回归方程 Regression equation	R²	最大增长速率出现天数 The days of MIR (d)	最大增长速率 Maximum increase rate (kg·d^-1·hm^-2)
2016	W1N0D1	Y = 23959.28 / (1 + e^{6.77 - 0.082 t})	0.993	82.56c	491.16b
	W1N0D2	Y = 27102.43 / (1 + e^{6.370 - 0.078 t})	0.998	81.66c	528.49b
	W1N0D3	Y = 27397.08 / (1 + e^{6.717 - 0.086 t})	0.994	78.10gh	589.03ab
	W1N1D1	Y = 31376.54 / (1 + e^{6.253 - 0.075 t})	0.996	83.37c	588.31ab
	W1N1D2	Y = 35421.91 / (1 + e^{6.684 - 0.082 t})	0.991	81.51d	726.14ab
	W1N1D3	Y = 38148.18 / (1 + e^{6.279 - 0.081 t})	0.995	77.51h	772.50ab
	W1N2D1	Y = 30937.64 / (1 + e^{6.763 - 0.085 t})	0.989	79.56f	657.42ab
	W1N2D2	Y = 31873.15 / (1 + e^{7.020 - 0.093 t})	0.987	75.48i	741.05a
	W1N2D3	Y = 33991.32 / (1 + e^{7.895 - 0.109 t})	0.996	78.43g	926.26ab
	W2N0D1	Y = 24905.35 / (1 + e^{6.125 - 0.07 t})	0.998	87.50a	435.84b
	W2N0D2	Y = 25644.27 / (1 + e^{7.164 - 0.085 t})	0.989	84.28b	544.94ab
	W2N0D3	Y = 26987.54 / (1 + e^{6.947 - 0.085 t})	0.994	81.72d	573.48ab
	W2N1D1	Y = 27740.45 / (1 + e^{6.978 - 0.088 t})	0.992	79.29f	610.29ab
	W2N1D2	Y = 31595.12 / (1 + e^{6.360 - 0.081 t})	0.996	78.52g	639.80ab
	W2N1D3	Y = 34762.66 / (1 + e^{6.335 - 0.082 t})	0.998	77.25h	712.63ab
	W2N2D1	Y = 31896.55 / (1 + e^{7.320 - 0.091 t})	0.983	80.44e	725.64ab
	W2N2D2	Y = 33346.21 / (1 + e^{7.149 - 0.093 t})	0.987	76.87h	775.29a
	W2N2D3	Y = 34354.051/ (1 + e^{7.584 - 0.102 t})	0.991	74.35j	876.02ab
2017	W1N0D1	Y = 30769.12 / (1 + e^{7.133 - 0.087 t})	0.906	81.98r	669.22m
	W1N0D2	Y = 34348.66 / (1 + e^{7.191 - 0.071 t})	0.949	101.28a	609.68p
	W1N0D3	Y = 39656.88 / (1 + e^{6.020 - 0.064 t})	0.967	94.06h	634.51n
	W1N1D1	Y = 39113.70 / (1 + e^{7.373 - 0.079 t})	0.970	93.68i	769.56i
	W1N1D2	Y = 40787.85 / (1 + e^{7.408 - 0.075 t})	0.968	98.77b	764.77j
	W1N1D3	Y = 42882.84 / (1 + e^{7.141 - 0.074 t})	0.976	96.50f	793.33h
	W1N2D1	Y = 42160.80 / (1 + e^{6.919 - 0.076 t})	0.959	90.68l	804.22e
	W1N2D2	Y = 45691.69 / (1 + e^{6.383 - 0.066 t})	0.948	97.45e	797.32g
	W1N2D3	Y = 47778.52 / (1 + e^{6.379 - 0.067 t})	0.954	95.21g	833.79d
	W2N0D1	Y = 26960.35 / (1 + e^{6.865 - 0.074 t})	0.940	92.77k	498.76r
	W2N0D2	Y = 30904.47 / (1 + e^{7.307 - 0.078 t})	0.971	93.32j	604.95q
	W2N0D3	Y = 34544.28 / (1 + e^{6.429 - 0.072 t})	0.969	89.29m	621.79o
	W2N1D1	Y = 37229.95 / (1 + e^{7.342 - 0.075 t)}	0.964	98.15c	696.20l
	W2N1D2	Y = 40222.45 / (1 + e^{7.138 - 0.073 t)}	0.943	97.78d	734.06k
	W2N1D3	Y = 41942.52 / (1 + e^{7.029 - 0.080 t)}	0.948	88.08o	836.75c
	W2N2D1	Y = 40936.35 / (1 + e^{6.895 - 0.078 t)}	0.973	88.39n	798.25f
	W2N2D2	Y = 44785.55 / (1 + e^{6.558 - 0.077 t)}	0.950	85.05p	863.24b
	W2N2D3	Y = 45594.61 / (1 + e^{7.410 - 0.085 t)}	0.941	83.17q	968.88a
显著性（P值）Significance (P value)
灌水水平W		—	—	*	NS
施氮水平N		—	—	*	*
种植密度D		—	—	*	*
灌水水平×施氮水平W×N		—	—	*	*
灌水水平×种植密度W×D		—	—	*	*
施氮水平×种植密度N×D		—	—	*	NS
灌水水平×施氮水平×种植密度W×N×D		—	—	*	NS