Dry Matter and Nitrogen Production and Allocation of Spring Maize on Dryland of North China in Different Farmland Water Management Patterns

doi:10.7668/hbnxb.2015.05.034

Abstract

Abstract: The objective of this study was to explore the technical feasibility and breakthrough way with one cropping system to replace double cropping system under richer fertility basis and high yield crop.Four different field experimental treatments were conducted which were including ridge tillage with plastic film mulching(RP),ridge tillage with bare land(RB),flat with plastic film mulching(FP) and flat with bare land(FB) to monitor the characteristics of dry matter and nitrogen accumulation translocation and allocation.Results indicated that the process of spring maize dry matter accumulation showed the representative feature of s curve.The late slow growth period appeared to stem as the center of the dry matter accumulation before tasseling stage again;The amount of accumulated dry matter up to total growth period of 47.02%-53.96% material,transported into the kernels reached 9.99%-25.22%;Among them,material transfer rate up to 25.22%-47.48% from the husk and cob accumulated.The spring maize dry matter accumulation higher than the CK by 17.19%-23.61%,because of water-retention effect of film mulching.The dry matter fast accumulation stage forewent 6.4 days,linear growth phase shortened 1.5 -2.5 d compared with CK.Characteristics of N accumulation showed that high rate renewly absorb N of soil and take stem as N enrichment central.43.08%-48.05% of the N storage in the maize plant transferred to seeds,the contribution ratio of N transferred to seeds was 49.01%-52.61%.Wherein,husk and cob transport rate was the highest,reached its nitrogen storage volume of 65.89%-71.40%. The plastic mulching treatment seedling stem and leaf nitrogen accumulation was higher than control 101.08%,the nitrogen stored in stem and leaf transport into grain could be thanked as "before storage after the turn" effect,so that the plastic mulching corn yield at 9.47%.One of the breakthroughs to enhance yield of spring maize one harvest in one year was the breakthroughs of a larger grain sink cultivars.

Key words: Spring maize, Dry matter and nitrogen production, Mulching pattern, Dry matter accumulation, Nitrogen accumulation

CLC Number:

S152.7S513

LIU Sheng-yao, FAN Feng-cui, LI Jia-xi, SHI Yu-fang, LIU Meng-xing, LI Zhi-hong, ZHANG Li-feng, JIA Jian-ming. Dry Matter and Nitrogen Production and Allocation of Spring Maize on Dryland of North China in Different Farmland Water Management Patterns[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(5): 214-222. doi: 10.7668/hbnxb.2015.05.034.

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