Ear Characters of Summer Maize: Response to Planting Density

doi:10.11923/j.issn.2095-4050.cjas20190700130

Abstract

Abstract:

To explore the response of ear characters of summer maize to different densities and the effect on yield composition, reveal the coordination relationship between ear characters, and provide a scientific basis for the high-yield dense-planting of new summer maize varieties, different density treatments were set up with ‘Hongda 216’ and ‘Kenfeng 101’ as experimental materials. Through determining ear row number, grain number per row and 1000-grain weight, the response of ear characters to planting density of summer maize was studied. The results showed that under different planting densities, the yield of each variety increased first and then decreased with the density, which was in line with the quadratic curve relationship. Correlation analysis showed that row number and ear length were extremely and significantly correlated with the yield, and the bald tip length was significantly correlated with the yield. The compact maize variety ‘Hongda 216’ had a very significant correlation between the ear row number and the yield, while the semi-compact maize variety ‘Kenfeng 101’ had a very significant correlation between the 1000-grain weight and the yield. Under the condition of rational close planting, it is easier to achieve high yield by coordinating the relationship between ear length, ear rows, row grains, and 1000-grain weight through fertilizer and water measures.

Key words: Summer Maize, Yield, Ear Characters, Planting Density

CLC Number:

Liu Xingzhou, Li Meng, Chen Ruiji, Fu Hua, Ma Guimei, Zhou Yanhu, Zhang Jian. Ear Characters of Summer Maize: Response to Planting Density[J]. Journal of Agriculture, 2020, 10(10): 12-18.

Figures/Tables 11

References 20

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试验点名称	中心点经纬度	年份	海拔高度/ m	太阳总辐射量/ (KJ/cm²)	年日照时数/ h	年≥10℃积温/℃	无霜期/ d	年降雨量/ mm
宿州市农业科学院东区基地	N33.640769 E117.086885	2016	27	5268	2354	4628	210	1058.6
宿州市农业科学院东区基地	N33.640769 E117.086885	2017	27	5346	2465	4598	210	906.5

试验点名称	中心点经纬度	年份	海拔高度/ m	太阳总辐射量/ (KJ/cm²)	年日照时数/ h	年≥10℃积温/℃	无霜期/ d	年降雨量/ mm
宿州市农业科学院东区基地	N33.640769 E117.086885	2016	27	5268	2354	4628	210	1058.6
宿州市农业科学院东区基地	N33.640769 E117.086885	2017	27	5346	2465	4598	210	906.5

品种	密度/(株/hm²)	穗长/cm	秃顶长/cm	穗粗/cm	穗行数	行粒数	轴粗/cm	千粒重/g	出籽率/%
弘大216	D1	17.3	0.1	5.3	15.4	36.4	3.0	349	89.2
	D2	16.3	0.1	5.3	15.1	31.8	2.9	345	89.8
	D3	16.2	0.3	5.2	14.6	30.1	2.8	340	90.8
	D4	14.7	0.2	5.3	14.5	29.8	2.8	342	89.6
	D5	14.1	0.6	5.1	14.3	27.6	2.8	330	89.5
	D6	13.0	0.6	4.9	14.0	24.4	2.7	318	90.3
垦丰101	D1	16.6	0.0	5.5	15.0	30.7	3.1	420	89.9
	D2	15.1	0.0	5.3	15.4	28.8	2.9	393	89.5
	D3	14.8	0.3	5.3	15.2	27.8	3.0	389	90.1
	D4	14.7	0.6	5.3	15.0	27.6	3.0	378	89.3
	D5	14.7	0.6	5.2	15.2	27.0	2.9	358	90.6
	D6	14.2	0.5	5.1	15.4	26.8	3.0	356	90.2

品种	密度/(株/hm²)	穗长/cm	秃顶长/cm	穗粗/cm	穗行数	行粒数	轴粗/cm	千粒重/g	出籽率/%
弘大216	D1	17.3	0.1	5.3	15.4	36.4	3.0	349	89.2
	D2	16.3	0.1	5.3	15.1	31.8	2.9	345	89.8
	D3	16.2	0.3	5.2	14.6	30.1	2.8	340	90.8
	D4	14.7	0.2	5.3	14.5	29.8	2.8	342	89.6
	D5	14.1	0.6	5.1	14.3	27.6	2.8	330	89.5
	D6	13.0	0.6	4.9	14.0	24.4	2.7	318	90.3
垦丰101	D1	16.6	0.0	5.5	15.0	30.7	3.1	420	89.9
	D2	15.1	0.0	5.3	15.4	28.8	2.9	393	89.5
	D3	14.8	0.3	5.3	15.2	27.8	3.0	389	90.1
	D4	14.7	0.6	5.3	15.0	27.6	3.0	378	89.3
	D5	14.7	0.6	5.2	15.2	27.0	2.9	358	90.6
	D6	14.2	0.5	5.1	15.4	26.8	3.0	356	90.2

品种	相关系数	穗行数	行粒数	穗长	穗粗	秃尖长	千粒重	出籽率	密度	产量
弘大216	穗行数	1
	行粒数	0.957^**	1
	穗长	0.919^**	0.939^**	1
	穗粗	0.699^**	0.756^**	0.764^**	1
	秃尖长	-0.869^**	-0.837^**	-0.826^**	-0.701^**	1
	千粒重	0.872^**	0.917^**	0.911^**	0.885^**	-0.863^**	1
	出籽率	-0.406	-0.446	-0.185	-0.201	0.318	-0.307	1
	密度	-0.972^**	-0.965^**	-0.981^**	-0.765^**	0.883^**	-0.919^**	0.275	1
	产量	-0.715^**	-0.687^**	-0.557^*	-0.178	0.508^*	-0.408	0.498^*	0.632^**	1
垦丰101	穗行数	1
	行粒数	-0.281	1
	穗长	-0.652^**	0.756^**	1
	穗粗	-0.342	0.868^**	0.742^**	1
	秃尖长	-0.166	-0.826^**	-0.323	-0.653^**	1
	千粒重	-0.322	0.955^**	0.747^**	0.879^**	-0.801^**	1
	出籽率	0.078	-0.272	-0.474^*	-0.237	0.200	-0.336	1
	密度	0.241	-0.926^**	-0.681^**	-0.884^**	0.842^**	-0.972^**	0.350	1
	产量	0.226	-0.774^**	-0.517^*	-0.517^*	0.582^*	-0.622^**	-0.065	0.515^*	1