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Study on Limiting Factors to Winter Wheat-Summer Maize Productivity in Hebei Plain

Author: XiaAiPing
Tutor: LiangWeiLi
School: Agricultural University of Hebei
Course: Crop Cultivation and Farming System
Keywords: Winter wheat - summer corn Production potential Limiting factor Development approach
CLC: S513
Type: Master's thesis
Year: 2006
Downloads: 135
Quote: 7
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Abstract

Winter wheat - summer maize double cropping is the main grain production in Hebei Plain cropping systems. In this paper, piedmont plain Gaocheng total of six counties in Xinji, Heilonggang Quzhou, daimyo, deep state, ningjin farmers formal investigation and expert surveys and the production potential of analog material based on the Hebei Plain winter wheat - summer corn production system analysis to the limiting factor restricting the production potential of a system, the objective of understanding the basis of research and policy decisions related research institutions, technology promotion departments and policy-making departments. The study results show that: the typical county of Hebei Plain winter wheat - summer corn production potential estimates: the productive potential of light and temperature simulation estimate value of 22916.6 26071.5kg/hm ^{2 , light and temperature precipitation productive potential of simulation estimate the value of 16860.5 ~ 18660.8kg/hm ^{2 . 2. Yield research fields yield can be as various counties in the current technical level of wheat - corn cropping systems technology potential indicator survey of farmers' output 13462.5 ~ 14525.0kg/hm ^{2 , and high-yield research only 66.9% to 73.2% of the field production. Constraints Hebei Plain - maize rotation produced by technical factors are: the use of confusing varieties; poor quality of soil preparation; unreasonable planting density, wheat planting density on large seeding rate, the tendency of large groups, corn planting density is generally low. ; improper sowing date; the bottom few organic fertilizer, fertilizer inputs serious imbalance and the number of unreasonable phenomenon exists, the total amount of wheat, corn and autumn put fertilizer in 557.66 900.09kg/hm ^{2 NPK application ratio between 1:0.36:0.09 the farmers more emphasis wheat fertilization, of which approximately 66.8% (60.8% of the nitrogen fertilizer, 85.1% of the phosphate fertilizer, potash 60.1%) for wheat and yield research fields and fertilizer compared to the amount of, (average N468.75kg/hm ^{2 the P ₂ O ₅ 211.25kg/hm ^{2 , K ₂ O 148.75kg/hm ^{2 , the ratio of 1:0.45:0.32, the total nutrient 828.75kg/hm of ^{2 ) under investigation The majority of farmers excessive amount of nitrogen fertilizer and potash investing little; lack of water conservancy facilities, improper irrigation period; lack of a comprehensive and correct understanding of pests and diseases. Wheat - corn, two crops of high, medium and low yield criteria for the classification (high-yielding ≥ 15000kg/hm ^{2 in the middle 11250 ~ 15000kg/hm ^{2 , low-yielding ≤ 11250kg/hm < sup> 2 ), to investigate the level of farmers' output in the middle stage, accounting for 74.6%; different regions in the main direction of the area targeted explicitly limiting factor in the primary and secondary. Constraints Hebei Plain - maize rotation produced economic factors low economic efficiency, the survey farmers wheat - corn and autumn average yield for 13759.58kg/hm ^{2 net output of 10,245.91 yuan / hm ^{2 ; compared with cotton, only 75.3% of the cotton profitability. 5. Restricting the Hebei Plain winter wheat - maize rotation produced social factors: small-scale land operation, farmers' enthusiasm for growing grain; farmers to obtain technical information mainly through informal channels, technology extension service system failed to give full play to function; national macro-control policy is also to some extent affected the play of wheat and corn production potential.}}}}}}}}}}}}

Study on Limiting Factors to Winter Wheat-Summer Maize Productivity in Hebei Plain

Abstract

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