| The results from our experiments revealed that foliar spraying with inorganic nutrition and different plant growth regulators (PGRs) have significant effect, on three local plants-glutinous maize, lettuce and Chinese cabbage, on the water, enzyme activity, amion acid, crude protein, reducing sugar, starch, vitamin C, chlorophyll, etc. relatively1.The effect on the metabolic direction and metabolic rate of the inherent-element: Foliar spray B9 or DA-6 on maize, peroxidase's activity of anaphase foliage increase from 23.80% to 39.24% than treat with base solution in anaphase, relative change scope about peroxidase's activity was from 48.96% to 66.40% between the second (June 25) and the third (July 1) time measurement. The reducing sugar and amino acid in tender seed of maize increased 10.15%~47.91% and 60.80%~92.96% respectively after treat with PGRs. The inherent-element of the two vegetables also changed much in field and pot experiment. The absolute content of plant inherent-element changed much when 'treated with PGRs, it means that the metabolic direction have been affected. The change scope of difference between different measurement time was regarded as the result of the change of metabolic rate being affected.2.The effect on the quality: We primarily feed the tender seed of the glutinous maize, so increasing the content of amino acid and reducing sugar in it is increasing the quality of the product. When sprayed PGRs in leaf, the amino acid and reducing sugar in tender seed increased 10.15%~95.82 and 58.54%~95.73% respectively compared with CK, only the reducing sugar in PCPA treatment decreased 26.57%. The content of NO3-N decreased 3.82%~9.41% and 24.15%~66.74% in pot-planted lettuce and in field-planted lettuce respectively when compared with base solution, the content of NO3-N decreased 16.09%~22.80% in metaphase of pot-planted Chinese cabbage, increased 0.41% in filed-planted treated with DA-6, and decreased 0.63%~28.18% in other treatment. When treated pot-planted lettuce with GA and BR, the amino acid content increased 186.00% and 100.00% in leaf and increased 6.38% and 34.57% in stem in anaphase. Pot-planted Chinese cabbage s content of the amino acid increased 34.94% and 31.47% in prophase when treated with DA-6 and BR, while treated with GA, the extent of decrease was21.43%~24.12%. Pot-planted lettuce's the content of reducing sugar in the leaf increased 9.97%~39.74% in prophase and metaphase and decreased 15.02%~21.25% in anaphase and its change extent in the stem was -17.12%~1.92%. Pot-planted Chinese cabbage's the content of the reducing sugar decreased 12.01%~34.87 in prophase but increased 33.76%~85.56% in metaphase and prophase. Pot-planted lettuce's the content of vitamin C decreased 18.64%~49.53% in prophase and metaphase but increased 0.49%~44.20% and 8.15%~21.05% respectively in leaf and in anaphase stem. Pot-planted Chinese cabbages the content of vitamin C decreased 9.25%~30.48% in various treatment. From the data in the experiment, we considered that foliar inorganic nutrition and PGRs can highly affect the plant's quality, while compounding it correctly can we meliorate the quality of the plant but not bring bad effect.3.The effect on the plant of the content of N, P, K and soil's available N, P, K: On July 1, we use base solution, CCC, DA-6, PCPA compared with CK found that the content of N, P, K in the maize leaf increased 5.23%~16.05%, 3.90%~10.60% and 0.98%~9.61% respectively. In soil, alkaline hydrolytic N decreased 3.43%-11.87%; the available P increased 3.12%~10.28% except decreased 13.06% in base solution; available K increased 11.39%~14.74% except decreased 53.06% in DA-6. It indicated that leaf fertilizer can affect the content of N, P, K in maize leaf, and can affect the validity of N, P, K in the soil through affecting the plant growth. So, we thought that using the leaf fertilizer reasonably is one of the good approach to enhance the ratio of using fertilizer. |
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