Effects of Optimum Cultivation on Population Photosythetic Character in Spring Maize

doi:10.3321/j.issn:1000-7091.1999.04.018

Abstract

Abstract: With spring maize Neidan 4 as experimental material and five factor-second universal regression ratary group disign (½),the effects of main cultivation factos on physicological indices were systematically studied by means of setting up index model of population photosythetic character accordingly.The result showed that relationship of the highest leaf area index(LAI)and total leaf area duration (LAD) with yield presented change curve of single peak,yield presented upward tendency when the highest LAI<5.8 or total LAD<3.627×10⁶m⊃2;⋅d/ha,LAI at filling stage and LAD in bloowing filling stage had more important effects on yield,bigger green leaf area and longer time after blooming could contribute to yield improvement.Under the conditions of local production,the optimun cultivation for 11250 kg/ha of Neidan 4 was following:density was 68850～70650 plants/ha;seed maurer:N 30 kg/ha,P₂O₅ 96.75～108.15kg/ha,K₂O 66.75～74.4 kg/ha;top dressing N,131.85～145.65 kg/ha at stem elongation,102.0～117.3 kg/ha at heading stage.Index parameter of population photosythetic character was:the highest LAI 4.83～4.94,total LAD 3.204×10⁶～3.297×10⁶ m⊃2;?d/ha,averaging 6.77～6.79 g/m⊃2;?d,in witeh LAD 7.98×10⁵～8.235×10⁵ m⊃2;?d/ha in blooming filling stage.

Key words: Maize, Optimum cultivation, Population photosythetic character, Yeild, Mathematical model

CLC Number:

S513.01

Hou Xuguang, Feng Yong. Effects of Optimum Cultivation on Population Photosythetic Character in Spring Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1999, 14(4): 92-102. doi: 10.3321/j.issn:1000-7091.1999.04.018.

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