Nitrogen, Phosphorus, Boron, A Preliminary Study On Growth And Yield Of Double Low Rapeseed

Xishui is one of the main counties to produce rape in Hubei province, it is also a major "double-low" rape county. In recent years, the "double-low" rape-growing areas have covered 400,000 mu. The increasing range of per unit area yield is smaller, and one of the most important factors for it is that nitrogenous fertilizer was applied singly, ignoring the principle of appling fertilizer with mult-element formulas , thus causing the rape's bad growing and low anticoagulantsim.Since 2001, Xishui county has undertaken on our nation's programs of "the fifteenth five year plan " on science and technology research, the study and paradigm about the good quality and efficiency production technology of double-low rape, one of the most important research programs is the nutrition of and appling fertilizer to the double-low rape. We have studied the effect which the nutrition elements such as nitrogen, phosphorus and boron make to the double-low rape-growing and its output by experimenting varied types and appling amount of nitrogen+ phosphorus+boron, phosphorus+boron and boron fertilizer, and expored the system of appling fertilizer to the double-low rape for its good quality, high efficiency and standardized production in order to provide theoretical basis for the guidance production of it in large area . The nitrogen+ phosphorus+boron experiment result shows that average output of the double No.9 and the oil hybrid No.2 is up to 119.2kg. and 127.2kg separately per mu bycoordinating appling nitrogen,phosphorus, boron fertilizer under the soil condition of Xishui and on the base of guarantee amount of potash fertilizer. Compared with appling nitrogen fertilizer singly, the increased output is up to 607.4% and 502.8% separately per mu, compared with appling phosphorus fertilizer singly, the increased output is up to 188.9% and 121.0% separately per mu, compared with appling boron fertilizer singly, the increased output is up to 869% and 635% separately per mu,the differences among the experiment reach the remarkable standards. By synthetical comparion, the increasing effect is N+P+B>P>N>B. Under the condition of appling N,P,B, the China double No.9 is more sensitive to the fertilizer than the oil hybrid No.2. In phosphorus and boron experiments, the high phosphorus and high boron are treated, the average output of the China double No.9 and the oil hybrid No.2 is up to 157.5kg and 176.8kg. Compared with the output of high phosphorus without boron , the output per mu is up to 10.5% and 20.6%. the compared increase due to appling phosphorus fertilizer reaches the remarkable standards. The experiment result shows that the increased output, is in direct propotion to the increased amount of appling phosphorus. Affected by boron, High phosphorus has ever more remarkable increasing effect. In the terms of the varieties, the hybrid rape is more sensitive to boron than common rape. In the experiments of phosphorus fertilizer varieties and their applied amount, when SOIubor...