Soil Hardening at Seedling Stage of Spring Maize in Hetao Irrigation District: Precipitation Index

doi:10.11924/j.issn.1000-6850.casb18120018

Abstract

Abstract:

The paper aims to perfect the local meteorological disaster indicators and provide better meteorological service for seeding in spring. The author chose major local maize variety ‘Denghai No.605’ as material to simulate the natural precipitation process by using the artificial precipitation system, and detected the soil compaction, emergence rate, plant height, and root-shoot ratio, to determine the precipitation index causing soil hardening at seedling stage of spring maize in Hetao irrigation district. The results showed that: (1) the precipitation index causing slight soil hardening was 2-3 mm; the precipitation index causing the medium soil hardening was 4-8 mm, ≥9 mm was considered the precipitation index causing severe soil hardening; (2) the earlier and greater the precipitation was after seeding, the easier the soil hardening formed and the thicker the hardening layer became.

Key words: ‘Denghai No.605’, soil hardening, precipitation index, Hetao irrigation district, seedling stage

CLC Number:

Xiangwei Sun. Soil Hardening at Seedling Stage of Spring Maize in Hetao Irrigation District: Precipitation Index[J]. Chinese Agricultural Science Bulletin, 2020, 36(9): 65-68.

Figures/Tables 6

References 22

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测定日期(月-日)	0~10 cm	10~20 cm	20~30 cm	30~40 cm	40~50 cm
4-18	67	80	93	86	89
4-28	70	73	91	80	85
5-8	75	85	83	78	79
5-18	73	83	83	79	79

测定日期(月-日)	0~10 cm	10~20 cm	20~30 cm	30~40 cm	40~50 cm
4-18	67	80	93	86	89
4-28	70	73	91	80	85
5-8	75	85	83	78	79
5-18	73	83	83	79	79

降水量级/mm	第1次降水出苗时未形成板结	第2次降水出苗时形成板结
3	83	72
6	76	58
9	62	49
12	64	28
对照(CK)	98	98

降水量级/mm	第1次降水出苗时未形成板结	第2次降水出苗时形成板结
3	83	72
6	76	58
9	62	49
12	64	28
对照(CK)	98	98

降水量级/mm	第1次降水出苗时未形成板结	第2次降水出苗时形成板结
3	9.2	4.9b
6	10.1	3.9b
9	12.0	3.0c
12	12.0	2.6bc
对照(CK)	7.2	7.2a