Relationship between Fruit Cracking and Fruit Development, Water Potential of White Flesh Loquat THE RESPONSE OF MIDDAY DEPRESSION OF DIURNAL VARIATION OF NET PHOTOSYNTHETIC RATE OF WHEAT LEAVES ON ECOLOGICAL FACTORS IN THE FIELD ENVIRONMENT OF QINGHAI PLATEAU Effect of Soil Moisture on Plant Growth, Contents and Components of Essential Oil in Fennel (Foeniculum vulgare Mill.)