Study on Grain Filling Characteristics of Different Wheat Crops

doi:10.11924/j.issn.1000-6850.casb2023-0199

Abstract

Abstract:

In order to study the characteristics of grain-filling process of different wheat crops, the grain-filling process of wheat variety ‘Ningmai 13’, barley variety ‘Longpi 1’ and highland barley variety ‘Kunlun 15’ was simulated by Logistic model. The differences of grain weight growth process and grain-filling parameters of the three crops were analyzed. The results showed that the 1000-grain weight of wheat, barley and highland barley were 51.60 g/(1000grain), 49.01 g/(1000grain), and 46.43 g/(1000grain), respectively, with significant differences among them (P<0.05). The effective grain-filling time of wheat was 45.89 d, which was 9.84 d and 3.59 d longer than that of barley and highland barley, respectively (P<0.05). The duration of rapid and slow growth stages of wheat grain weight was significantly longer than that of barley and highland barley, while there was no significant difference between barley and highland barley. The average grain-filling rate of barley was 1.37 g/(1000grain·d), which was 18.10% and 24.55% higher than that of wheat and highland barley (P<0.05), respectively. The grain-filling rate of barley at the rapid growth stage, the slow growth stage and the maximum grain-filling rate were significantly higher than those of wheat and highland barley, and there was no significant difference between highland barley and wheat, but the grain-filling rate of barley decreased the fastest at the rapid growth stage. Therefore, the difference of grain weight among wheat, barley and highland barley mainly depends on the duration of grain-filling, and the difference of grain weight between barley and highland barley mainly depends on the grain-filling rate.

Key words: wheat crops, logistic model, grain-filling rate, grain-filling duration, 1000-grain weight

ZHANG Shan, WANG Peiying, JIANG Xiaodong, CAI Chunhao, ZHENG Jianjie, YANG Zaiqiang. Study on Grain Filling Characteristics of Different Wheat Crops[J]. Chinese Agricultural Science Bulletin, 2024, 40(6): 16-21.

Figures/Tables 5

品种	方程	B	A	K	R²
小麦	$W = 53.37 / (1 + 31.61 e - 0.18 t)$	31.61	0.18	53.37	0.998^**
大麦	$W = 49.27 / (1 + 44.10 e - 0.23 t)$	44.10	0.23	49.27	0.989^*
青稞	$W = 46.63 / (1 + 86.94 e - 0.21 t)$	86.94	0.21	46.63	0.996^**

品种	方程	B	A	K	R²
小麦	$W = 53.37 / (1 + 31.61 e - 0.18 t)$	31.61	0.18	53.37	0.998^**
大麦	$W = 49.27 / (1 + 44.10 e - 0.23 t)$	44.10	0.23	49.27	0.989^*
青稞	$W = 46.63 / (1 + 86.94 e - 0.21 t)$	86.94	0.21	46.63	0.996^**

灌浆参数	品种
灌浆参数	青稞	大麦	小麦
理论最大千粒重K/[g/(1000grain)]	46.63±1.13c	49.27±0.71b	53.37±2.09a
最大灌浆速率R_max/[g/(1000grain·d)]	2.50±0.12b	2.86±0.15a	2.34±0.07b
平均灌浆速率R_ave/[g/(1000grain·d)]	1.10±0.04b	1.37±0.06a	1.16±0.02b
有效灌浆时间T₉₉/d	42.30±1.35b	36.05±2.06c	45.89±1.56a
灌浆活跃期D/d	31.10±0.82a	25.74±1.41b	32.22±1.13a
达到最大灌浆速率的时间T_max/d	20.85±0.62a	16.29±0.81b	19.69±0.80a
灌浆渐增期持续时间Δt₁/d	14.70±0.75a	10.62±0.46c	12.18±0.68b
灌浆快增期持续时间Δt₂/d	12.30±0.72b	11.33±0.72b	15.02±0.55a
灌浆缓增期持续时间Δt₃/d	15.30±0.90b	14.10±0.90b	18.69±0.69a
渐增期灌浆速率R₁/[g/(1000grain·d)]	0.67±0.05b	0.98±0.03a	0.93±0.03a
快增期灌浆速率R₂/[g/(1000grain·d)]	2.19±0.11b	2.51±0.13a	2.05±0.06b
缓增期灌浆速率R₃/[g/(1000grain·d)]	0.61±0.03b	0.70±0.04a	0.57±0.02b

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