宁夏引黄灌区春小麦氮磷钾需求及化肥减施潜力
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王西娜,于金铭,谭军利,张佳群,魏照清,王朝辉
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Requirement of Nitrogen, Phosphorus and Potassium and Potential of Reducing Fertilizer Application of Spring Wheat in Yellow River Irrigation Area of Ningxia
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WANG XiNa,YU JinMing,TAN JunLi,ZHANG JiaQun,WEI ZhaoQing,WANG ZhaoHui
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表6 不同施磷量下春小麦产量、生物量、产量构成因素及养分含量
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Table 6 Biomass, grain yield and its components of spring wheat and concentrations of N, P and K in grain at different P2O5 rates
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| 处理代码Treatment | 施磷量
P2O5 rate
(kg·hm-2) | 生物量
Biomass
(kg·hm-2) | 籽粒产量
Grain yield (kg·hm-2) | 收获指数
Harvest index (%) | 公顷穗数Ears per hectare
(×104·hm-2) | 穗粒数
Number of grains per ear | 千粒重
1000 grains weight
(g) | 籽粒含氮
N concentration in grain (g·kg-1) | 籽粒含磷量
P concentration in grain
(g·kg-1) | 籽粒含钾量
K concentration in grain
(g·kg-1) | | P0 | 0 | 21452±3126a | 5361±894a | 25.2±0.04b | 472±17a | 32.4±1.0ab | 47.4±2.5b | 20.82±2.6b | 3.46±0.9a | 4.09±0.4a | | P1 | 48 | 18870±2608ab | 5746±967a | 30.4±0.01a | 456±31a | 34.8±5.4a | 45.8±1.0b | 25.22±3.9a | 3.84±0.1a | 3.84±0.1ab | | P2 | 96 | 18550±403ab | 5203±498a | 28.1±0.03ab | 424±25a | 35.0±0.9a | 49.6±1.9a | 27.40±6.1a | 3.71±0.1a | 3.65±0.1b | | P3 | 120 | 17712±3650b | 5474±957a | 31.0±0.01a | 469±87a | 30.0±2.8b | 50.9±3.3a | 25.35±3.1a | 3.93±0.3a | 3.61±0.2b |
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