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根据向日葵苗情不宜估测籽粒产量损失的数学模型

DOI: 10.3321/j.issn:1000-7091.1993.03.022, PP. 118-121

Keywords: 向日葵,苗情不宜,产量,回归模型

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Abstract:

Wade多元回归模型曾用于高粱和向日蔡苗情评鉴。但由于这种方法尚未经试验单独检验,所以,本研究旨在通过田间试验验怔并进一步改进该模型。结果表明,预则籽粒产量与实测籽粒产量之间非常吻合,说明山苗情不宜预测籽粒产量损失的回归分析法可靠。晚出苗植株比早出苗植株对产量的贡献小,即使在稀植条件下也是如此。断条超过2m以上显著减产。目前,正研究确定苗情是否适宜和是否需要补种的简单方法。

References

[1]  Wade LJ, The effects of suboptimal plant density and nun-uniformity in plant spacing on grant yield of raingrown sunflower. Australian Journal of Experimental Agriculture,
[2]  Wade LJ. EstimatinG, loss in groin yield due to suboptimal plant density and non-uniforrnrty in plant spacing. Australian Journal of Gxperimental Agriculture, 1990,30 251-255
[3]  Radford BJ, Wood IM et al. Survey of sorghum and sunflower establishment in the Central Highlands-Project Report Q089027. Quccnsland Department of Primary Industries, Brisbane, 1989, 41
[4]  Wade LJ. Mycrs RJK ct al. Optimising plant stand in response to climatic risk. in: Muchow RC and Bcllamy. Climatic Risk in Crop Production: Models and Management for the Semiarid Tropics and Subtropics. I''rocecdings of the International Symposium of Climatic Risk in Crop Production.

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